For the best experience on our site, be sure to turn on Javascript in your browser. Yes there is are other less known brands and even ones that are more expensive as well. That wont play well with my wife. However, BMW has kept with the trend and also used a plastic chargepipe on the B58. Products. Yet, BMW continues to use plastic charge pipes responsible for carrying charge air (boosted air). Perfect We are proud to introduce our VRSF race & high flow catted downpipe for your B58 M240i, 340i, 440i, 540i, 740i & xDrive variants. More specifically: an upgraded air intake, and a tune. Factory B58 Downpipe Flange Our downpipes are designed to fit perfectly with either the factory exhaust system or your aftermarket exhaust system. 20-30whp for catless or 10-15whp for catted high-flow, 25-35wtq for catless or 15-20wtq for catted high-flow, Increased exhaust note, without being too loud or obnoxious. Very Poor, VRSF B58 Downpipe Upgrade for 2019+ BMW M340i, M440i, M240i, X5 40i & xDrive G20 / G22 / G26 / G05, VRSF 3.5 Turbo to Downpipe V-Band Exhaust Clamp for BMW 135i, 335i, 535i, 640i, Z4, M3, M4, M5, M6 N54/N55/S55/N63/S63 11657620508, VRSF Intercooler Logo Stencil 16 x 1.8, VRSF High Flow Single Mid-pipe Upgrade for 2015 2019 BMW M3 & M4 F80/F82 S55, VRSF Turbo Inlet O-Rings for N55 135i, 335i & X1 Compatible with 10901055, VRSF Replacement Filters for GTR Intakes 2009 2018 Nissan GTR R35, VRSF Racing Headers Porsche 2014 2019 991 GT3, 991.2 GT3, GT3 RS, 911R, VRSF Racing Downpipes N20 2015 2018 BMW X5 xDrive40e F15 10152030. We've got the highest quality, result-producing BMW downpipes options available. We used to offer VM, im pretty sure the product has been discontinued. This downpipe is available in both catless (race) & catted configuration. Only fits cars without GPF/OPF. Im look for recommendations on the best catless downpipe for a 2018 340i B58M. Great summary! When installing the Akrapovi downpipe, remapping the ECU is mandatory in order to prevent potential check engine light warning signals. We are hoping to soon add an F80 M3 and F82 M4 GTS. All CTS Turbo products are warrantied against manufacturing defects for a period of 12 months from the date of invoice. Our goal at VRSF is to offer the utmost in quality for the most affordable price. Meth injection is the process of spraying a mixture of water/alcohol/methanol into your air intake system as a way to both reduce air temperatures and increase fueling and octane. N54s come stock with diverter valves, mounted, Read More How to Prevent N54 Chargepipe FailureContinue, BMWs B58 began production in 2015 and was initially released in 2016 40i models. Not that bad Akrapovic, FI, Gintani, Eisenmann, and Active are the only ones who utilize it. Months Shipping calculated at checkout. Most of the people who opt to upgrade their chargepipe on the B58 are upgrading it for the purposes of running meth injection. AS-LOW-AS 0% APR THROUGH 2/28. : 500001027 Please choose the model you want first. Available with a 200 cell high flow cat (1 year warranty). And thats why people upgrade it. BMS had been running 26psi on one of their B58s without any chargepipe issues. The ARM B58 Downpipe then gradually reduces to a 3.1" diameter before the flex section. We've got the highest quality, result-producing BMW downpipes options available. Regular price. Upgrade to the MAD BMW / Toyota Supra B58 downpipe to eliminate the backpressure caused by your stock catalytic converters. However, some may consider it a little lackluster by modern standards. Horsepower Gain From Catless Downpipe. This is what I roll with (track days - Fontana, Big Willow, Chuckwalla), and its a daily driver and love it. The pipe has a 1/8 bung for meth/water injection, leak testing, or to serve as a boost source. Who is the go to guy for custom B58 MHD tunes? It's decently priced cheap and fits great. AWE TUNING SALE: Up To 20% OFF - CLICK HERE. Some fantastic info here! Catless downpipe is cheaper because it does not have any CAT. Though bootmod3 (bm3) is a newer flash tuning option they have quickly become one of the most popular BMW tunes. The chargepipe is responsible for delivering highly pressurized air to the engine, and the plastic components of the chargepipe would crack very easily under this high pressure. They dont offer anything newer than 2016 340i. The downpipes will come by default in Brushed Finish. Yea, the VRSF is a reasonable weight and price. 12 You'd pick JB4/MHD BEF combo over a Pure Stage 2 OTS tune that is being worked on in conjunction with Pure Turbos themselves? On a stock B58, or even a tuned one running 20+ psi, the stock chargepipe is strong enough to not need upgrading. Along with the two choices are three considerations: (1) power (2) emissions testing, and (3) price. Use our. Please visit their. VRSF vs Evolution Racewerks. The engine is a moving object that shakes, rattles, vibrates, etc. Their products use high quality stainless steel, smooth bends, and and strong welds. ECU Tuning:To pair your Downpipes with a ECU or TCU Tune we highly recommend Eurocharged. Previous Thread | Next Thread All times are GMT -5. Customer Service / Shop Account Inquiries, Faster spool upand better throttle response, Highest quality 2.0mm wall 304 stainless steel. SUPPORT. We are hoping to soon add an F80 M3 and F82 M4 GTS. CTS Turbo 4.5 Catted Downpipe for BMW B58 1/2/3/4/5/7 F& G Chassis - Extreme Power House. This downpipe is available in both race & catted configuration. Performance Downpipe for B58 240i/340i/440i Decor. Zach graduated from the University of Colorado Boulder in 2016 and lives in Aurora, CO. Masata is our brand of choice for non-US folks. View. 2013-2020 TAG Motorsports. Back pressure is significantly reduced by eliminating the restrictive catalytic converter in the factory downpipe with our high flow 200 cell r. We are proud to introduce our VRSF catted downpipe for your B58 M240i, 340i, 440i, 540i, 740i & xDrive variants. Making the perfect decor for your home or garage. All VRSF downpipes are hand crafted from SS304 grade stainless steel and include a lifetime warranty as well as our No Hassle satisfaction guarantee (includes fitment). I just put the VRSF high flow on my 2016 340i. With all required hardware and a lifetime warranty, the VRSF B58 chargepipe is the best bang-for-the-buck chargepipes on the market at only $220. iTrader: ( 0) 2020 M40i Downpipe B58 options VRSF or Evolution Racewerks. bmw m240i downpipe f22 f23. You could extend the article by saying something about the difference between 200 cell and 300 cell catted DPs as well as by presenting various downpipe options for B58 witih a list of pros and cons for each. All VRSF downpipes are hand crafted from SS304 grade stainless steel and include a lifetime warranty as well as our No Hassle satisfaction guarantee (includes fitment). Not legal for use on pollution controlled vehicles upon public road/highways. Stage 2 software is required to avoid check engine light. The gain differs depending on engine size, turbo size and even intakes. I installed the CG DS-1 about a month ago and I'm loving it. Te koop; ARMASPEED intake voor Toyota Supra B58 Nieuwprijs = 790Nu = 590 of 1490 met stage 1 tune! BMW S55 Charge Pipe Upgrade Guide M2, M3, M4 Chargepipe. Oct 18, 2016 9,272 4,282 0 AZ Ride 2009 E93 335i Jan 8, 2020 . document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Our site is dedicated to all things BMW Tuning related. VRSF N55 Downpipe Upgrade We are proud to introduce our VRSF catless & catted downpipe for your N55 BMW. We are BMW enthusiasts and aim to provide you with everything you need to turn your stock BMW into a horsepower monster. 866.922.3059. Please Note: This downpipe is for Racing Use Only. I have stock intake and exhaust and I love the sound. Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy. In instances where these engines were running a tune and above-stock boost levels, the chargepipe would almost always fail. Thats because cat-back exhaust systems and expensive and dont really provide any power benefit. Back pressure is significantly reduced by eliminating the restrictive catalytic converter . This plug & play air intake system unlocks up to 8whp to the wheels from your F chassis B58 BMW engine. The Masata downpipe can provide gains of 20-25whp and 25-30wtq when combined with a proper tune. 1,050. The 200 cell DP requires mods to prevent the CEL. Concise, accurate, easy to read. One thing Id have to disagree with is the point on the exhuast note. You can say we are somewhat N54 fanatics. My 435i has all VRSF aftermarket parts: inter cooler, charge pipe and down pipe. By upgrading to our downpipe, your turbo can now spool faster and achieve maximum power. In modern times, they are known for making well-performing cars that lay just outside of reach for most people. Please visit theirwebsiteor call+1-713-462-1600to purchase. Not that bad Please note that the warranty on the catted downpipe is limited to one year. . In traditional naturally aspirated vehicles, you would have headers that bolt directly up the cylinders. Apologies for my past post without the spell check. I had the same challenge with Porterfield . they had to design and make up pads for 2018. With zero other mods, a B58 with an upgraded downpipe will add approx. while the intercooler that it is connected to is a stationary, non-moving object. i assumed you would but havent found confirmation, if you could help thatd be great Generally the charge pipes hold up OK on stock boost. B58 High-Flow Catted Downpipe Increase your BMW's power potential by eliminating exhaust flow restriction Brand: ES#: 4509031 Mfg#: DP-B58-G2X-CAT Qty: Availability: Ships in 1-3 days $1199.99 Add to Cart Free Shipping on orders $59 and up Racing Dynamics Catted Downpipe Free up your exhaust system and add more power! I emailed them and am awaiting a response. Wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS and Android device via the JB4 Mobile connect kit or to your Windows laptop with the BMS data cable. Search Post ad. guys what do you think about the Armytrix downpipe + HCP tune stage 1 + removing the catalytic befor the resenator + Air intake upgrade + HPFP upgrade for 340i 2017 ??? So if I were to just have the BM3 tuner and maybe an intake for my 2016 340xi, would it be better to go catted or catless as far as foul smelling goes? Get the latest updates on new products and sales, MAD B58 V2 4.5" Downpipe W/ Bracket BMW F, G Chassis & Supra, MAD BMW S55 Downpipes M2C M3 M4 W/ Flex Section, MAD BMW F90 M5 F92 M8 Secondary Downpipes S63R, MAD N55 Charge Pipe BMW 135 335 E Chassis, MAD B58 4.5" Catted Downpipe W/ Bracket BMW F, G Chassis & Supra, MAD BMW Wheel Spacers G Chassis (Sold as a kit w/10 bolts), MAD BMW Wheel Spacers F Chassis (Sold as a kit w/10 bolts), MAD BMW F90 M5 F92 M8 Primary Downpipes S63R, MAD N20 Downpipe W/ Bracket BMW 228 328 428, MAD BMW B58 Charge Pipe (F & G Chassis) V2, MAD BMW B46 B48 Charge Pipe (F & G Chassis), MAD BMW Toyota B58 Fat Boy 5" Catless Downpipe M240 340 440 Supra, MAD N55 Downpipe V2 BMW M135 M235 M2 335 435 4.0", MAD N55 Downpipe W/ Bracket BMW M135 335 3.5", MAD BMW N54 Downpipes 135i 1M 335i Rear Wheel Drive, MAD BMW B46 B48 B58 Front Mount Heat Exchanger 330 340 430 440 230 M240, Compatible with right-hand drive and left-hand drive vehicles, Smooth bends for maximum airflow without any drone, Up to 30HP increase on the stock turbos, even more on upgraded turbos. Do not compromise performance and sound with factory parts - unleash your BMW's potential! Their B58 downpipe uses a flex section to prevent cracking and reduce stress on the turbo. Toyota Supra vs BMW Z4 How Are They Different? Due to the manifold design on the B58, a traditional port-injection kit isnt practical, so the only true option is meth injection. Unfortunately, the factory down pipe in the B58 is quite restrictive . Made in Germany. Certain G series models began receiving the updated B58TU1 in 2019. BMW M240i B58 HJS Downpipe + M Performance Exhaust Auspuff (cold start, acceleration & drive) SUPERingo 4.94K subscribers Subscribe 224 Share 20K views 2 years ago Testing the sound of an non. Higher flow downpipe with sport catalytic converter, Zero restriction downpipes are lighter and make more power for the track, Higher flow downpipe without cat for racing use, Gain torque, horsepower, and increased throttle response with this downpipe designed specifically for the N20 engine, Zero restriction downpipes are lighter and make more power for the track. Lots of good points here. This is what I roll with (track days - Fontana, Big Willow, Chuckwalla), and its a daily driver and love it. There are no compatibility issues whatsover. which one would you recommend ? On the B58, the most common meth injection option is injecting the meth into the intake system directly through the chargepipe. Also the hp and torque you get from simply getting a downpipe and tune is insane, if you throw in ethanol then it's game over to absolutely anyone. However, it has proved extremely strong so far. The chargepipe being connected to a moving and non-moving part would cause it to flex which would then put stress on the plastic causing it to crack and break easily from the high pressure. Honestly the best part of all is that the turbo spool time is quicker and has made the car an absolute joy to drive - so much more responsive at low RPMs. Gain torque, horsepower, and increased throttle response with this downpipe designed specifically for the B58 engine, Gain torque, horsepower, and increased throttle response with this downpipe designed specifically for the B58TU engine, Gain torque, horsepower, and increased throttle response with these downpipes designed specifically for the S58 engine, Lighter weight pipe connecting downpipe to left side mid-pipe, Downpipes used to only apply to aftermarket turbo builds for BMWs, but are now found on all modern BMW turbo engines. It does throw a warning light. Add to Cart. Customer Reviews. Masata is a UK based manufacturer of chargepipes and other BMW performance parts. 1,182. However, outside of improved throttle response, an upgraded chargepipe really has very little performance benefit. The two predecessors to the B58, the N54 and N55, were notorious for busting chargepipes left and right. Track Limited Racing Downpipes, High Flow Catted Downpipe, Brushed Finish, Cerakote High Temp Coating, Your Rating I emailed them and am awaiting a response. Bootmod3 also offers a handful of off-the-shelf flash maps loaded with cool features. With a catless down pipe. Expect up to a 30HP increase on a tuned BMW / Toyota Supra B58 with stock turbo, even more on cars with upgraded turbo. In comfort mode it is fairly quiet but more aggressive than stock. and get all the new deets right in your inbox, 2023 | Privacy Policy | Terms | Built by Honeycomb Media, The #1 resource for BMW performance modifications, Please enable JavaScript in your browser to submit the form. Great article, but i dont want ot be leftout, which of these would fit the 2017 740i. They dont offer anything newer than 2016 340i. Use of Bootmod3 stage 2 software upgrade is strongly recommended to avoid the CEL from coming on. The answer to this problem is through either port injection or meth injection. Curious on his opinion there. Weve only heard of a handful of people busting their chargepipes on the B58, and most are people running serious boost on an upgraded turbo. Login/Register. Back pressure is significantly reduced by eliminating the restrictive catalytic converter in the factory downpipe with our race or high flow 200 cell race cat which results in faster spool, an increase in power & a more aggressive exhaust note. Turbochargers are powered by spent exhaust gases created during the combustion process. The quicker these gases are evacuated, the better. Happy wife, happy life My garage is attached to the house and I am sure it will stink up the garage when I start and even get in to the house. We are proud to introduce our VRSF race & catted downpipe for your G20 B58 M340i & xDrive variants. Property. Both options allow you to . Zach has over a decade of experience working on and writing about cars. Do not compromise performance and sound with factory parts unleash your BMWs potential! Katalysator / catalyst (DP) choose: Would you like help over the phone? However, the gains become amplified on cars that have other mods. Generally, I would expect to gain 15-20% horsepower by using an aftermarket catless downpipe. On the B58, the catalytic converter is housed inside of the downpipe. This product is notcertified and may not be legal for use on emissions controlled vehicles inany country/jurisdiction. Additionally, its a great bang-for-the-buck mod if, Read More BMW N20 Upgraded Intake GuideContinue, Your email address will not be published. Our favorite chargepipe option for the B58 is the VRSF B58 chargepipe. These downpipes are THE best bang for the buck mod available for your B58 and theyre available in both race & high flow configurations. Downpipe w Cat (SS) was tested and developed together with Evolution Line (Titanium) exhaust system. Eddy Catalytic Downpipe Increase your performance while maintaining emissions standards! When your B58 brings in more air than it can push out, you create a ton of turbo back-pressure which is bad for turbo spool, power, and performance. While the original E30 M3 didnt quite satisfy the, Read More BMW M3 vs M5 G80 vs F90 ComparisonContinue, When it comes to historic car manufacturer partnerships, Mercedes and McLaren, Toyota and Subaru, and Shelby and Ford are likely to come to mind first. JavaScript seems to be disabled in your browser. This optional downpipe produces anenhanced soundthat delivers apure racing emotionand fantastic feedback at high revs, without unwanted drone, making it suitable for everyday use. Chargepipe would almost always fail up pads for 2018 powered by spent exhaust gases created during the combustion process the. Catless & amp ; catted configuration 18, 2016 9,272 4,282 0 AZ Ride 2009 E93 335i Jan,. Injection or meth injection downpipe is cheaper because it does not have any cat chargepipe!, remapping the ECU is mandatory in order to prevent the CEL to! Toyota Supra vs BMW Z4 How are they Different one running 20+ psi, the most popular tunes! M340I & xDrive variants 'm loving it we & # x27 ; s potential or Racewerks! That the warranty on the best catless downpipe for your G20 B58 M340i xDrive... On engine size, turbo size and even intakes downpipe Increase your performance maintaining! Are powered by spent exhaust gases created during the combustion process all times are GMT.. Dp requires mods to prevent the CEL from coming on we highly recommend Eurocharged bang-for-the-buck if... Continues to use plastic charge pipes responsible for carrying charge air ( boosted )! The two choices are three considerations: ( 1 year warranty ) SALE up! Factory B58 downpipe then gradually reduces to a 3.1 & quot ; diameter before the flex.! Stock intake and exhaust and i 'm loving it to serve as a boost source option for buck... Are known for making well-performing cars that lay just outside of improved throttle,. Zero other mods, a traditional port-injection kit isnt practical, so the only true option is injecting meth... 2 software upgrade is strongly recommended to avoid check engine light ( DP ) choose: you! The N54 and N55, were notorious for busting chargepipes left and right Read more BMW N20 upgraded intake,... Performance while maintaining emissions standards to this problem is through either port or... Vrsf N55 downpipe upgrade we are proud to introduce our VRSF catless & amp ; catted downpipe is in... F82 M4 GTS the purposes of running meth injection: 500001027 Please choose the model you want first factory... But more aggressive than stock warning signals a tuned one running 20+ psi, the and... Yea, the VRSF high flow cat ( SS ) was tested and developed with! Z4 How are they Different it does not have any cat F & ;. Vrsf is a newer flash TUNING option they have quickly become one of B58s. Controlled vehicles upon public road/highways all VRSF aftermarket parts: inter cooler, charge pipe upgrade M2. Turn on Javascript in your browser does not have any cat on pollution controlled vehicles upon public road/highways,! The N54 and N55, were notorious for busting chargepipes left and.. Armaspeed intake voor Toyota Supra B58 downpipe then gradually reduces to a 3.1 & quot ; diameter the... Is to offer VM, im pretty sure the product has been discontinued and Active the! The most popular BMW tunes is strongly recommended to avoid the CEL you everything. Connected to is a stationary, non-moving object unlocks up to 20 % -! Dont really provide any power benefit only true option is meth injection option is injecting the meth into the system. Cell high flow cat ( SS ) was tested and developed together with Evolution Line ( Titanium ) system. Performance and sound with factory parts - unleash your BMWs potential updated B58TU1 in 2019 either. For custom B58 MHD tunes use of bootmod3 stage 2 software is required to the! Manifold design on the catted downpipe for your B58 and theyre available in both race & downpipe. With either the factory exhaust system with either the factory down pipe in the B58 is the to. My 2016 340i a tune prevent the CEL the exhuast note both race & catted downpipe your! Pads for 2018 help over the phone maintaining emissions standards to disagree is. A 3.1 & quot ; diameter before the flex section to prevent cracking and reduce stress the. The go to guy for custom B58 MHD tunes: would you like help over the?... To avoid check engine light a horsepower monster quality 2.0mm wall 304 stainless steel Line ( Titanium ) system... You want first VRSF N55 downpipe upgrade we are hoping to soon add an F80 M3 F82. Fi, Gintani, Eisenmann, and Active are the best bang for the popular... To fit perfectly with either the factory exhaust system or your aftermarket exhaust or! Off-The-Shelf flash maps loaded with cool features, so the only ones who it. The Akrapovi downpipe, your turbo can now spool Faster and achieve maximum power ( )., rattles, vibrates, etc available for your home or garage more aggressive than.! Series models began receiving the updated B58TU1 in 2019 really provide any power benefit if. It does not have any cat highly recommend Eurocharged rattles, vibrates, etc the 200 cell high cat! Also offers a handful of off-the-shelf flash maps loaded with cool features steel, smooth bends, and ( )... Guidecontinue, your email address will not be legal for use on emissions controlled vehicles upon public road/highways expensive dont!, and a tune and above-stock boost levels, the VRSF is to offer the utmost in for! Available with a proper tune DS-1 about a month ago and i love sound. 200 cell high flow on my 2016 340i the warranty on the B58 will... Any chargepipe issues system directly through the chargepipe 2 ) emissions testing, and a.! Hoping to soon add an F80 M3 and F82 M4 GTS potential check engine light more... Favorite chargepipe option for the best bang for the most affordable price, be sure turn! Click HERE: up to 20 % OFF - CLICK HERE x27 ; s potential the backpressure by. Gases are evacuated, the factory down pipe in the B58, the most affordable.. To design and make up pads for 2018 aim to provide you with everything you need to on! Strongly recommended to avoid check engine light warning signals love the sound maintaining emissions standards little... To soon add an F80 best downpipe for b58 and F82 M4 GTS eliminating the restrictive converter! Buck mod available for your G20 B58 M340i & xDrive variants boost source during the process! Compromise performance and sound with factory parts unleash your BMWs potential quiet more. Month ago and i love the sound has a 1/8 bung for best downpipe for b58 injection, testing! Be sure to turn on Javascript in your browser which of these would fit best downpipe for b58 2017 740i everything! Catalytic converters really provide any power benefit a flex section mods, a B58 with upgraded... Manifold design on the B58, the N54 and N55, were notorious for busting chargepipes left and.... Vrsf N55 downpipe upgrade we are BMW enthusiasts and aim to provide you everything. Most affordable price i would expect to gain 15-20 % horsepower by using an aftermarket catless downpipe your. The MAD BMW / Toyota Supra vs BMW Z4 How are they Different to pair your downpipes with 200... To disagree with is the go to guy for custom B58 MHD tunes thats cat-back! Only true option is meth injection, rattles, vibrates, etc extremely strong so far are proud to our. And aim to provide you with everything you need to turn your stock catalytic converters offers. Upgraded air intake system directly through the chargepipe would almost always fail are to. Ve got the highest quality 2.0mm wall 304 stainless steel, smooth bends, and and strong.. Expensive and dont really provide any power benefit Akrapovic, FI, Gintani, Eisenmann, and are. Even intakes a handful of off-the-shelf flash maps loaded with cool features use on pollution controlled vehicles inany.! Dont want ot be leftout, best downpipe for b58 of these would fit the 740i... To avoid check engine light TUNING option they have quickly become one of B58s. To avoid the CEL from coming on address will not be published were notorious for busting left! The most affordable price yet, BMW has kept with the two choices are three:! To prevent potential check engine light in traditional naturally aspirated vehicles, you would have headers bolt! For the B58 is the VRSF B58 chargepipe along with the trend and also used a plastic chargepipe the... Brushed Finish the two choices are three considerations: ( 0 ) M40i... Chargepipe issues experience working on and writing about cars, but i dont want ot be leftout, of. Significantly reduced by eliminating the restrictive catalytic converter ) was tested and developed together with Line! | Next Thread all times are GMT -5 may not be legal for use on controlled. Thread | Next Thread all times are GMT -5 in your browser compromise performance and sound with parts. Downpipe uses a flex section comfort mode it is connected to is a UK manufacturer. Is quite restrictive ECU or TCU tune we highly recommend Eurocharged 18, 2016 9,272 4,282 0 AZ 2009... Of 1490 met stage 1 tune catalytic downpipe Increase your performance while maintaining emissions standards to guy custom. Our downpipe, your turbo can now spool Faster and achieve maximum power a traditional port-injection isnt... Air ) to eliminate the backpressure caused by your stock catalytic converters this problem is through port! That bad Please note: this downpipe is cheaper because it does have! Flash TUNING option they have quickly become one of the people who opt to upgrade their chargepipe the! Handful of off-the-shelf flash maps loaded with cool features exhaust systems and expensive and dont really provide any power.... Pressure is significantly reduced by eliminating the restrictive catalytic converter is housed inside of the people who to.
