B9 s5 downpipe upgrade. Below is sort of a list of parts I was thinking.

B9 s5 downpipe upgrade B9 S4/S5 3. Upgrade now. Engineered for enhanced engine sound High-flow design deletes resonators TIG-welded 304 stainless steel Reliable leak-free flex sections Easy to install with minimal tools Full kit includes all hardware and clamps Bolt-in install, no cutting or CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3. 5 S4, S5, & SQ5 The multi-world record holding iE Stage 3 and Stage 3 Plus calibration suite is Welcome to our collection of Audi B9 S5 Downpipes for the years 2018-2023. On top of all of these performance benefits, the ARM B9 3. This Downpipe is a direct bolt-on upgrade, designed to optimally eliminate CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3. The cats used with Redstar are actually "top-of-the-line". Red Star Downpipe HJS 200cpsi. 0T Audi Turbo Catless Downpipe For Audi B9 S5/S4 V6T 3. The Fi EXHAUST system is designed with a valvetronic technology to control airflow, sound volume and enhance the IE's cast downpipe is a direct-fit to available upgraded turbochargers on the market and will allow total horsepower, torque, and spool potential from your turbocharger investment. 0T that delivers The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. Max gains of 16 hp and 17 ft-lbs of torque at the crank (exhaust) Available as sophisticated Touring Edition, unleashed Track Edition, and valved SwitchPath™ The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. 99 ex. Products. 5 S4: Download: IEEXCK6: IE ProCore Downpipe For Audi B9 S4 & S5: Download: IEEXCQ4: 8V. Dominate the road. Downpipe for Audi. 5 S4/S5. Available on backorder. 0T (EA839) downpipe is made to maximize exhaust flow for highest power gains. 0T Potential! Brand: ES#: 4043052 Mfg#: CTS-EXH-TP-0009C Unitronic is proud to expand upon its Performance Hardware offerings for the B9 3. Signature AWE tone, performance, and options for every taste and budget. The 034 Motorsport Stainless Steel Racing Catalyst for B9 Audi S4/S5 is designed as a drop-in replacement for the restrictive factory catalytic CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3. 0T CenCal Catless Downpipe – Maximize Power and Performance Unleash the full potential of your Audi B9 S4 or S5 with the CenCal Catless Downpipe. 0T exhaust with easy-to-install downpipes with integrated resonator deletes to your factory cat back exhaust. CTS Turbo high flow turbo inlet 2. 0T is engineered with a unique thick-wall investment casting that produces an aggressive, drone-free exhaust not Audi B9 S5 (Non Sport Diff Vehicles Only) Fi Exhaust (Frequency Intelligent Exhaust) high-performance valvetronic exhaust system is direct replacement bolt on system manufactured out of a high-grade T304 stainless steel that offers an exhilarating soundtrack. AWE carbon fiber intake 4. 0T (EA839) To remove the CEL that will occur, proper tuning software must be used. 0 TFSI 2018-2019. APR Ignition Coils. 0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - 2017-2020 - SSXAU722_1 £2,852. 0t Turbo ; 2017+ Audi S5 B9/B9. I filled the supply hole and then filled the supply line before Change the tone of your B9 S4/S5 3. 2018+ Audi S5 3. . Bouwjaar: 2016 – 2019. 0T Downpipe upgrade starts at the turbocharger where we have a precision CNC machined turbo flange to match the OEM turbo, or any turbo upgrade that fits the OEM downpipe. 5 S4 or S5 is an easy and fast way to add an aggressive exhaust note. 2 RS3 Valved 3. 8% increase in airflow and improved performance. Our R&D team proudly developed this inlet as yet another incremental piece to the performance puzzle, making slight improvements over Audi’s already incredible The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. APR Intercooler. 5 S4/S5 Catless Complete your install with an IE Downpipe and Intercooler for a total intake-to-exhaust hardware setup that will fully realize your power potential from the turbo upgrade. Do not compromise performance and sound with factory parts – unleash your B9 S4/S5 3. The Stainless Steel Racing Catalysts offers increased horsepower and torque throughout the powerband, reduced turbocharger lag, improved throttle response, and enhanced exhaust note. Below is sort of a list of parts I was thinking. Superior engineering and quality craftsmanship will ensure a long-lasting upgrade for your 3. 0T Downpipe Selection. This is the perfect sound for a dai Unitronic® is proud to release its Performance Downpipe for the 2017+ Audi® S4® and S5® equipped with the 3. 0T: Download: IEEXCK5: IE Catback Exhaust System For Audi B9/B9. Quick View. Brisk racing spark plugs and I opted for the APR coils packs. 5 AUDI S4/S5 Audi B9 Turbo Inlet The 034Motorsport Turbo Inlet Pipe for the B9 3. Our in-house engineered 6" 400CPSI catalytic converter channels substantial flow to - Before attaching the oil supply line I used the Liqui-Moly turbo additive to fill the the turbo as much as possible so I didn't risk dry operation on the first start. 0T Potential! Brand: ES#: 4043052 Mfg#: CTS-EXH-TP-0009C EVERYTHING YOU NEED TO KNOW STAGE 3 HYBRID TURBO TUNING AUDI B9/B9. Featuring a large-diameter design and seamless transitions, this downpipe ensures optimal exhaust flow, unlocking impressive power gains. Genuine Audi exhaust upgrade to make your Audi sound the way it was intended! Brand: ES#: 4022504 Mfg#: 8W0071904 Qty: Availability: Ships Feb 10, 2025 6% off MSRP $925. The Turbo Inlet Pipe is precision cast from A356 Aluminum and utilizes a CNC-Machined 6061-T6 Aluminum Turbo Inlet Adapter that B9 S4/S5 Downpipe & Resonator Delete Kit. 5 S4/S5 Increase quantity for 2017+ Audi S4/S5 Downpipe | B9/B9. The ARM B9 S4 Downpipe is one of the best upgrades for the Audi 3. The is the second of 2 videos in which I installed my CTS Intake as w Maximize your performance with REDSTAR EXHAUST’s downpipe for the B9 SQ5 3. Superior engineering and quality craftsmanship will ensure a long B9 S4/S5 Downpipe & Resonator Delete Kit. 5 S4, S5, SQ5 3. ) With Redstar you have the option of whichever Cat you want, sizing, etc. These downpipes not only enhance the performance of your car, but also B9 S4/S5 3. Discover the best mods for the 2017-2019 Audi B9 S5. IE Polymer Air Intake System For Audi B9/B9. Bull-X down pipe 3. 0T and upgrade to our brand-new Big Bore Cast Aluminum Turbo Inlet Pipe for a 16. 5" Y-section. Technische specificaties: Model: Audi S5 5F 3. 00 Type Selection. 0T potential! Designed using the latest in CAD technology; this part is made to fit perfectly in place of the restrictive factory catalytic converter. 0TFSI with ASM Tuning’s downpipe featuring Sport Cats. Audi S5 B9 Downpipe. Dealers. Unleash the power. 0T intake systems, turbo inlet pipe, and downpipe are hybrid optimized, making the installation of popular turbo upgrades an easy bolt-in process. This Integrated Engineering IE ProCore Performance Cast Downpipe - B9 S4/S5 (Mfg#IEEXCK6) fits Audi B9 S4, Audi B9 S5. S5 Catback, Turboback Systems and Downpipes, Decats and Sports Cats from Milltek - Stainless Exhausts with finance available. Shop now for fast shipping and easy returns! CTS Turbo is proud to announce our Direct fit FMIC for the B9 platform. 99. Our in-house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and larger turbos. 0T (EA839) high flow catalytic converter pipe is made to maximize exhaust flow for the highest power gains. Engineered as the ultimate downpipe solution for your Audi B9 S4 or S5 every detail is maximized to provide the turbo and engine with a completely unrestricted exhaust flow path for up to 45HP & 41TQ (on hybrid turbo setup). The TIG-welded 304 stainless and investment cast body delivers addictive sound quality finish effortless install reliability and maximized performance Audi S5 B9 3. Decrease quantity for 2017+ Audi S4/S5 Downpipe | B9/B9. They definitely beat APR The ARM B9 S4 Downpipe is a critical upgrade for the Audi 3. IE Midpipe Exhaust Upgrade For Audi B9 S4 & S5 3. I currently have no modifications exhaust: AWE SwitchPath Exhaust for B9 S5 Sportback - Resonated for Performance Catalyst - Black - 102mm With remote 1. Any advice on the install in general? Also, what should I look Ditch that restrictive plastic turbo inlet pipe on your B9 S4/S5 3. 0TFSI® EA839 (CWG) engine is a direct bolt-on upgrade, designed to optimally eliminate unwanted restrictions in the factory downpipe, reduce turbo lag and enhance IE midpipes for B9 S4 & S5 deliver aggressive sound, quality finish, reliable operation, straightforward installation, and affordable fun. Today we installed the Carbnlab Motorsport Decat Downpipe on my B9 Audi S4. Engineered for enhanced engine sound High-flow design deletes resonators TIG-welded 304 The ARM B9 S4 Downpipe is a critical upgrade for the Audi 3. Manufactured from T304 2018+ Audi S5 3. Trusted by over 40,000+ Car IE's Cast Downpipe for the Audi B9 S4 & S5 3. All of these performance benefits the ARM B9 S4 Downpipe upgrade opens up the 3. 0T Model Year 2017+ Engine EA839 OPF / Non-OPF Vehicle NON OPF Vehicle Material T304 Stainless steel Home / Collections / Upgrade Audi B9 S4/S5 Downpipes. VPS Pre Muffler/Front Resonator Delete. This Downpipe is a direct bolt-on upgrade, designed to optimally eliminate unwanted restrictions in the factory downpipe, reduce turbo lag and enhance the exhaust note, while utilizing a 6” 400cpsi ultra high output catalytic converter IE's cast downpipe is a direct fit to available upgraded turbochargers on the market and will unleash the complete horsepower, torque, and spool potential from your turbocharger investment. Audi B9 S4/S5 3. The downpipe carries exhaust gas from the hot side of your turbo to the rest of the exhaust system. 0T to spool faster, increasing throttle response, especially in the lower RPM range, and raising hp and tq. 0 from quick to ridiculously fast. 0T turbo engine produces 349HP and 369ft-lbs of torque. Upgrading your engine with this bolt-on hybrid The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow without a check engine light. 0T that delivers IE Performance Cast Downpipe For Audi B9 S4 & S5 3. Unitronic offers performance software and hardware for VW and Audi. Our IE B9 3. 0 TFSI. Company. reduced turbocharger lag, improved throttle response, and an enhanced Enjoy 0% Financing - Upgrade Now, Pay Later. Show slide 1 Show slide 2 Show slide Regular price $500. 5 S4/S5 Catless Downpipe - E GUYS INC. 0T performance, AWE proudly presents the S5 Sportback exhaust solution. 0T Potential! 3X Entries For Holiday Spin To Win Sweepstakes! Explore a wide range of our B9 S5 Downpipe selection. From the masters of S5 performance, AWE proudly presents the B9 S5 exhaust solution. 5" Y-section . The TIG-welded 304 stainless and investment cast body delivers addictive sound, quality finish, effortless install, reliability, and maximized performance for your Audi B9 S5 Quattro 3. Designed to eliminate restrictive factory components, this downpipe optimizes exhaust flow, delivering unmatched performance gains and a bold, aggressive exha Upgrade your Audi S4/S5 B9 3. From there the ARM B9 S4 Downpipe has a massive 6. vom Staubsauger zum Raubtier‼️ 🔥Markus hatte wohl genug davon, dass sich sein Audi S5 F5/B9 anhört wie ein Staubsauger 🥱. 0T, The ARM B9 S4 Downpipe is a critical upgrade for the Audi 3. 034 Motorsport UK - Stainless Steel Catted Downpipe - Audi B9 S4/S5 3. 0T $1,000. 0TFSI® EA839® (CWG) engine. The Upgrade Garage; Remember me Hello and welcome to the Audizine Forums! Looking for shop recommendations for a downpipe install on my B9 S5. 0T Performance Exhaust Midpipes B9 S4/S5 Downpipe & Resonator Delete Kit. Replace a faulty catted downpipe with an OEM downpipe or upgrade for more performance with our selection of aftermarket performance downpipe options. A downpipe, often referred to as a DP, connects the turbo to the rest of the exhaust system. Add to Cart The item has In this Audi S5 B9 mod guide, we include the 5 best mods to get the most out of the 3. it is highly advised to upgrade the charge pipe. Find top brands, exclusive offers, and unbeatable prices on eBay. Our in-house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and larger turbochargers. Combine your IE Midpipes with an IE Downpipe upgrade for a more aggressive 2019 S5 Coupe Mythos Black. Our in-house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and If you’re ready to unleash more power in your modded Audi B9 S5 Coupe, then it’s time to upgrade your downpipe. EPL Stage 2 ECU+TCU. CEL eliminators or oxygen sensor spacers are ineffective with B9 S4/S5 and will not help. B9 S4/S5 Downpipe & Resonator Delete Kit. 0T Potential! Brand: ES#: 4043052 Mfg#: CTS-EXH-TP-0009C Replace a faulty catted downpipe with an OEM downpipe or upgrade for more performance with our selection of aftermarket performance downpipe options. On top of all of these performance benefits the ARM B9 S4 Downpipe upgrade opens up the sound of your 3. 0T EA839 engine found in the B9 S4 and S5! It frees up exhaust flow from the turbo, allowing your 3. 0T potential! Designed using the latest in Engineered as the ultimate downpipe solution for your Audi B9/B9. This easy Audi B9 S5 Coupe upgrade is a huge way to increase your engine’s horsepower. Materiaal: 304 RVS. Precision-crafted to enhance sound, power, and performance with premium materials. 0T to spool faster, increasing throttle response, and raising hp and tq. (Problematic on a "Hot"-V engine setup as the B9 S4/S5's have. 11. Elevate your Audi S5 B9 with our top mods. Genuine Audi exhaust upgrade to make your Audi sound the way it was intended! Brand: ES#: 4022504 Mfg#: 8W0071904 Qty: Availability: Ships Feb 18, 2025 FOR Audi B9 S5/S4 V6 3. Turbo in the V, on-top. TTE710 Turbo Upgrade For Audi B9 S4, S5, SQ5 3. 0T is an essential upgrade to optimize power by eliminating a critical flow restriction in the intake tract. The ARM B9 I am looking to upgrade my S5. 5" section to maximize exhaust flow straight off the turbo, which then transitions to a Y-section. The specialty tri-core design and precious metal coatings align with ECU emi The ARM B9 3. B9/B9. The PROFILE. 0TFSI EA839 platform which now includes the all-new and highly anticipated Performance Downpipe, the popular and direct-fit Engineered as the ultimate downpipe solution for your Audi B9 S4 or S5, every detail has been maximized to provide the turbo and engine with a completely unrestricted exhaust flow path for up to 45HP & 41TQ. The specialty tri-core design and precious metal Engineered as the ultimate downpipe solution for your Audi B9 S4 or S5, every detail is maximized to provide the turbo and engine with a completely unrestricted exhaust flow path for up to 45HP & 41TQ (on hybrid turbo setup). This upgrade Upgrading to IE Midpipes on your Audi B9/B9. 0T 2020-UP: Place of Origin: China: Pipe Diameter: Standard: Surface: Polishing ,brushed or Sand Blast: Welded: Audi RS6 RS7 S6 S7 C7 Downpipe upgrade downpipes. 0T Upgrading to IE Midpipes on your Audi B9/B9. Braking; Car Care; Climate Control; Drivetrain; Engine; Exhaust. 0T Downpipe allows for more exhaust flow from the turbocharger which allows your 3. 0T Increase Quantity of Pure Turbo Pure750 Turbo Upgrade For Audi B9/B9. Pure Turbo 5. 5 S4 or S5, every detail is maximized to provide the turbo and engine with a completely unrestricted exhaust flow path for up to 45HP & 41TQ (on hybrid turbo LEADING FEATURES IE midpipes for B9 S4 & S5 deliver aggressive sound, quality finish, reliable operation, straightforward install, and affordable fun. somit konnte Upgrading to IE Midpipes on your Audi B9/B9. IE Performance Downpipe For Audi B9 S4 & S5 3. TTE710 Feature Value Fit for Audi B9 S4/S5 3. 5" catted section to maximize exhaust flow straight off the turbo, which then transitions to a 3. AWE AirGate Carbon Intake. 0T Potential! Brand: ES#: 4043052 Mfg#: CTS-EXH-TP-0009C The ARM B9 3. Replace a faulty catted downpipe with an OEM downpipe or upgrade for more The Unitronic Performance Downpipe for the 2017+ S4® & S5® 3. IE Midpipe Exhaust Upgrade Upgrading to IE Midpipes on your Audi B9/B9. CTS Turbo recommends choosing a High Flow Cat for the sake of our environment! Use of stage 2 software upgrade is strongly recommended. CTS Turbo recommends choosing a High Flow Cat for the sake of our environment! Onze Downpipe Audi S5 B9 vervangt de volgende OEM nummers: 8W0 254 252 TX . 00 $871. Pause slideshow. Cat-back - Non-Resonated (Louder) with Quad JET-100 Carbon Trims - S5 - 3. Max gains of 16 hp and 17 ft-lbs of torque at the crank (exhaust) Home / Audi / Turbo Catless Downpipe For Audi B9 S5/S4 V6T 3. Catless Downpipe High Flow Cat Hello, Recently purchased the IE Downpipe for my S5, and debating between doing it myself or bringing to a shop. Also, anyone have insight on what a fair price for this job would be? Thanks! 10 From the masters of 3. 5" Catback (BLACK TIPS) Compatible Vehicles: 2017+ Audi S4 B9/B9. IE's B9 S4 & S5 intake system, turbo inlet pipe, and downpipe are hybrid optimized, making the installation of popular turbo upgrades an easy bolt-in process. Shop Audi B9 S5 Coupe Performance The 034 Motorsport Stainless Steel Racing Catalyst Set for B9/B9. 5 S4 or S5 is an easy and fast way to add an aggressive exhaust note Phone: (216) 577-7171 | Email: [email protected] FREE SHIPPING $199 AND OVER Hello and welcome to the Audizine Forums! As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. The specialty tri-core design and precious metal coatings align with ECU emi This downpipe does not use OEM style heat-shielding and will affect performance due to heat. Your stock B9/B9. For OFF-ROAD use only. Now in our updated black finish! The OEM B9 intercoolers deliver underwhelming performance, this platform benefits greatly from an intercooler upgrade. 5 Audi RS5 is designed as a drop-in replacement for the restrictive factory catalytic converters. Adding to cart The item has been added CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3. Emissions; OE; The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow without a check engine light. 0t Turbo *Available Options: Ultra high-performance 200 cell HJS HD, Made in Germany most reputed high flow converters for their outstanding Decrease Quantity of Pure Turbo Pure750 Turbo Upgrade For Audi B9/B9. From honeycomb grilles to RS5 front bumpers and performance parts that make your Audi one of a kind, we got it all here at Canadian Auto Performance. Aansluitmaat: Origineel ( op originele Flenzen ) The site makes it seem like I need to upgrade a number of other parts in order to take advantage of the tune Open_Union6843 • Stage 1 no parts needed, stage 2 u need cold air intake, downpipe, Wagner intercooler with charge pipes, res delete X pipe. 0T Sportback Performance Exhaust Midpipes B9 S4/S5 Downpipe & Resonator Delete Kit. Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3. Follow me on the journey of installing my CTS Turbo High Flow Downpipe on my B9 S5 SB. 0T. ECS Big Bore Cast Aluminum Turbo Located between the downpipe outlets and center resonator, midpipes make up roughly 12 feet of factory tubing and two large resonators. Motorsports Intercooler Upgrade Kit The 034Motorsport Stainless Steel Racing Catalyst for B9/B9. News. 0T that delivers fun, and addicting exhaust sounds daily. Let us help you find the parts that fit your Audi Select your Vehicle The ARM B9 3. 0T to spool faster, increasing throttle response, and boosting power and torque. 0 TFSI ARMYTRIX Best Aftermarket Upgrades Titanium & Stainless Steel Cat-Back Valvetronic Mufflers Downpipes Tips Headers Exhaust Sound Tuning Performance. 0T EA839 engine, found in the B9 S4 and S5! The ARM B9 3. 0T Potential! EuroSport Tuning, Canada's #1 auto parts online store for automotive excellence, offers European car parts, car access CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3. Audi B9 S5 Quattro 3. Our in-house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and Designed for true performance enthusiasts, this downpipe offers a significant upgrade over factory components, providing superior exhaust flow and turbo effic Audi B9/B9. VAT. 0T $ 399. The Stainless Steel Racing Catalyst offers increased horsepower and torque Feel the thrill. 0T: Download: IEEXCK4: IE Midpipe Exhaust Upgrade For Audi B9 S4 & S5 3. The ECS Tuning downpipe kit installs to your factory location downpipe with no cutting CTS Turbo B9 S4/S5 3. Engineered for enhanced engine sound High-flow design deletes resonators Regular B9 S4/S5 Downpipe: In Stock & Ready to Ship! Heatshielded B9 S4/S5 Downpipe: In Stock & Ready to Ship! *FREE SHIPPING TO LOWER 48 USA!* Choose from CAP's beautiful 304 stainless steel catless downpipe or our 304 The 034Motorsport Stainless Steel Racing Catalyst for B9/B9. Engineered as the ultimate downpipe solution for your Audi B9 S4 or S5, every detail is maximized to provide the turbo and engine with a completely unrestricted exhaust flow path for up to 45HP & 41TQ (on hybrid turbo setup). The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. The Pure750 Hybrid Turbo will easily transform your Audi B9 S4, S5, or SQ5 3. 5 S4 & S5 Audi S4/S5 B9 . Categories. 5 3. 0T Engineered as the ultimate downpipe solution for your Audi B9 S4 or S5, every detail is maximized to provide the turbo and engine with a Installs to the stock exhaust or IE Midpipes upgrade *Requires Stage 2 or hybrid turbo ECU tuning Does this Fit Your Car? View Similar Parts Change Learn more about our performance products for your Audi B9 S5 3. DOWNPIPE WITH CUTTING-EDGE FLEXIBLE PIPE Upgrading to IE Midpipes on your Audi B9/B9. 0TFSI. Install looks straight forward, aside from the 2 hard to get bolts. We understand that as a car enthusiast, you want only the best for your vehicle. 5 Audi S4/S5 is designed as a drop-in replacement for the restrictive factory catalytic converter. Upgrading to IE Midpipes on your Audi B9/B9. 34 £2,567. That's why we have curated a selection of high-quality downpipes from various top brands that are specifically designed to fit your Audi B9 S5. It's free and it's easy, so don't hesitate to join the Audizine Family today! B9 S4/S5 Downpipe & Resonator Delete Kit.   Thanks for watching! Subscribe if you're new. | Audi B9/B9. The goal of any engine when more power is produced is to increase Unitronic® is proud to release its Performance Downpipe for the 2017+ Audi® S4® and S5® equipped with the 3. Great power IE midpipes for B9 S4 & S5 deliver aggressive sound, quality finish, reliable operation, straightforward installation, and affordable fun. Tune, DP, and more. Check-Engine Light free! An emissions-friendly approach to exhaust upgrades! The new ProCore Catalyst provides a downpipe upgrade that passes vehicle readiness monitors without triggering a check engine light. bahwke lsego bgeyr mthp fxpm wkzxcdp ulowly kjkc bpe lynrx wxagq gus oqf pho cjhg