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ECS loves helping you make your car all it can be; that's why we've put all the top-of-the-line performance parts for your Audi B7 S4 together in one place. This list, compiled by our own AUDI gurus, is everything you need to outfit your car with all those goodies you've wanted for your build. Let's make race season even more fun with all the best performance parts for your Audi B7 S4!

ECS loves helping you make your car all it can be; that's why we've put all the top-of-the-line performance parts for your AUDI B9 S4 together in one place. This list, compiled by our own AUDI gurus, is everything you need to outfit your car with all those goodies you've wanted for your build. Let's make race season even more fun with all the best performance parts for your Audi B9 S4!

Light on weight. Long on looks. ECS Tuning 2-Piece rotors combine the natural advantages of a cast iron braking surface with the weight savings and rapid heat dissipation of an aluminum hat. Cast iron-gray and durable matte black hats create an eye-catching contrast that accents painted calipers behind open-faced alloy wheels. These beauties have all the extras: black anodized hats, cross-drilled and slotted brake faces; non-braking surfaces painted for good looks and corrosion resistance.

Upgrade your Audis reliability and performance with a precision-engineered billet aluminum reservoir designed to replace the failure-prone factory unit. Built to eliminate the common issue of leaks found in OEM plastic reservoirs, this high-quality upgrade delivers long-term durability and peace of mind under both daily driving and high-performance conditions. Crafted from robust aluminum, this reservoir is engineered for a seamless installation - fully compatible with factory hoses and the original mounting bracket. That means no complicated modifications, just a straightforward upgrade that integrates cleanly into your existing setup while dramatically improving resilience and longevity. Inside, the design goes far beyond a simple replacement. An integrated mesh filter helps capture contaminants before they circulate through your system, while the fully removable filter element allows for easy cleaning and ongoing maintenance. This serviceable design ensures your system continues operating at peak efficiency over time.

Pricing While Supplies Last!! Get your VW/Audi a new set of wheels this spring!

The 2021 Audi C8 RS6 Avant is the ultimate expression of supercar performance wrapped in everyday usability. Beneath its wide bodied, aggressive design sits a twin turbo 4.0L V8 producing 674awhp, paired with Audis legendary quattro AWD system for relentless grip in any condition. From highway pulls to back-road precision, the RS6 Avant delivers blistering acceleration, razor-sharp handling, and the unmistakable presence of one of Audis most iconic performance vehicles. This spring, one lucky enthusiast will have the chance to take home this RS6 Avant through our sweepstakes elevated even further with support from some of the most trusted names in the industry. APR is supplying the performance software tune to unlock the RS6s true potential, while AWE enhances the experience with a signature exhaust note worthy of the cars performance pedigree. Neuspeed wheels sharpen the stance and handling, and we finish off the build with our ECS high performance cold air intake and Street Shield skid plate, ensuring both form and function are fully addressed.

The Perfect Daily B9.5 S4 build series by Integrated Engineering documents the journey of transforming an Audi B9.5 S4 into a highly capable, enthusiast-driven daily performance sedan. Across three episodes, the iE team takes viewers from the initial introduction of the platform and build goals through the thoughtful installation of key performance upgrades tailored for the turbocharged 3.0T V6 including high-flow intake and exhaust components, intercooler and ECU tuning enhancements, and other bolt-on hardware designed to improve power, throttle response, and overall driving engagement. In the finale, the fully upgraded B9.5 S4 hits the track for roll racing, showcasing the results of the integrated modifications and tuning in a real-world performance environment that highlights more refined power delivery, boosted performance, and a more spirited driving experience ready for everyday use.

Take your braking to the next level with our Stage 4 Front Big Brake Kit, engineered for enthusiasts who demand maximum stopping power. This high-performance kit includes quality, race-inspired braking components, delivering track-ready performance and precision stopping directly to your vehicle. Each part is designed and tested in-house at ECS Tuning to ensure quality, reliability, and compatibility with your application. At the heart of our kit are massive ECS 18Z 6-piston front brake calipers, which provide exceptional clamping force for consistent, fade-free braking. These calipers work in tandem with large 2-piece floating rotors, which reduce stress on the rotor hat while allowing the friction surface to expand independently under heat. This floating design improves braking leverage and ensures that your rotors maintain optimal performance even under heavy, repeated stops on the street or track. Additionally, our proprietary rotors are cross-drilled and slotted, giving you the perfect balance of durability, performance, and cooling. The slotted surfaces provide improved bite and consistent stopping power, while the cross-drilled pattern allows heat and gases generated during braking to escape, reducing the risk of fade and extending rotor life. Complementing the rotors are ECS EP24 "Enthusiast Performance" brake pads, formulated to deliver aggressive stopping power, smooth engagement, and reliable performance in all conditions.

Esoteric means "for the select few", and that select few are made up of passionate car enthusiasts who want something better than the status quo. Esoteric was founded on the belief that car owners deserved something that delivered excellent results, as well as a premium experience. You are that car owner we envisioned. Every Esoteric detailing product was prioritized for its top-of-the-line chemistry, simplicity in form and function, and sensory experience delivered by premium scents, bottles, sprayers, and soft-touch labels. We love cars, and we wanted that love to come through with each and every product we put our name on. You can rest assured that when you use Esoteric detailing products, you are using chemistry that has been tried and tested by actual detailers who are detailing cars day in and day out. Stop settling for the lowest bidder. Graduate to the Esoteric experience to find out what a true, premium, American-made car care brand can deliver for you.

As 2025 comes to a close, we're taking a moment to look back at the releases that made this year unforgettable. From standout launches to customer favorites, these products defined innovation, creativity, and performance for us-and for our community. Join us as we revisit our favorite releases of 2025 and celebrate the highlights that helped shape the year. Thank you for being part of the journey-we cant wait to show you what comes next year.

This vent tube is located on top of the oil separator/PCV assembly in the valley of the engine block. The opposing end attaches to the bottom of the supercharger for proper ventilation. The OEM plastic tube can become brittle over time, leading to a plethora of other issues. Our ECS vent tube features a billet construction for increased durability to help future-proof your 3.0T by preventing the cracking and warping that comes with plastic components! Our Billet Vent Tube Upgrade was designed, engineered, tested, and quality inspected by our Research and Development team in our Wadsworth, Ohio, facility. We strive for the highest level of precision and quality through leading-edge product development technology, including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

Is your engine throwing a misfire code? The problem is generally a failing ignition coil. Ignition coils provide spark, which is an essential step of the internal combustion process. If the spark is faint or nonexistent, power will decrease, and your engine will experience misfires. Moreover, as a vital component of your ignition system, coils should be changed every 40,000-60,000 miles. If you're experiencing misfires or ignition-related faults, or if you're due for a new set of coils, choose ECS Tuning Performance Ignition Coils for a durable, long-lasting upgrade that is sure to earn back lost performance. ECS Performance Ignition Coils are an excellent upgrade for vehicles of all performance levels. These direct plug-and-play coils provide greater spark energy than factory ignition coils, resulting in a stronger, more consistent spark. The attractive red housing with ECS Tuning etched resin complements any engine bay.

Our ALZOR wheel and tire packages bring together our most popular wheel styles paired with high-quality tires, all mounted and balanced for you right out of the box. Its the easiest way to upgrade your vehicles look and performance without the hassle, giving you a ready-to-install setup that saves time and gets you back on the road quicker. If you dont see a style paired with tires you want please reach out and we will make you a kit!

This BMW G87 M2 with a manual transmission is a car built for true enthusiasts, channeling the raw spirit and balanced driving dynamics that made the E46 M3 so iconic. Like its predecessor, the G87 M2 embraces a compact, rear-wheel-drive layout with perfectly judged proportions, offering an agile chassis that thrives on twisty roads and track days alike.

The wheel that redefined OEM+ just got its evolution. Introducing the NEUSPEED RSe10R; a modern refresh of NEUSPEED's all-time best seller, the original RSe10. With its flow formed construction, precision-engineered fitments, and iconic split 10-spoke layout, the RSe10 earned its place as the go-to aftermarket wheel for VW and Audi enthusiasts worldwide. The RSe10R builds on that legacy � bringing sharper lines, deeper spoke pocketing, and a more aggressive overall stance, while retaining everything that made the original great: lightweight performance, perfect fitment, and daily-driver durability. From daily commute to weekend canyon run, the RSe10R offers a refined look that doesn�t shout � it shows. The sculpted spokes and motorsport-inspired silhouette make it an ideal match for modern Euro builds that demand both form and function.

Unlike the factory plastic pipes, our billet aluminum set features dual 75A Viton Fluoroelastomer o-rings on each end. This upgrade provides maximum sealing power, easy installation, and effortless serviceability. If you're looking for an upgrade that provides both reliability and serviceability, choose ECS Billet Aluminum Oil Pipes for your DL501 DSG transmission.

Don't let a dead battery or flat tire leave you stranded. The 4-In-1 Jump Pack & Tire Inflator is the ultimate emergency companion, engineered for convenience, power, and versatility. Compact yet powerful, this all-in-one unit features a lithium-ion jump starter, digital air compressor, high-lumen LED flashlight, and power bank'everything you need to stay safe and get back on the road quickly.

The ECS Tuning Luft-Technik Induction System for the Audi B6/B7 S4 4.2L is a precision-engineered upgrade designed to unleash the full character of Audis high-revving, naturally aspirated V8. This performance-driven system enhances throttle response, improves airflow, and amplifies the engines signature intake growl, transforming every acceleration into a visceral experience.

The Apex ML-10RT forged wheels are designed for high-performance vehicles, offering a blend of lightweight construction and exceptional strength. Engineered using advanced forging technology, these wheels provide superior durability and improved handling. Their sleek, multi-spoke design not only enhances aesthetics but also ensures optimal brake clearance. Ideal for track enthusiasts and street drivers alike, the Apex ML-10RT wheels deliver both style and performance.

From the factory, Audi's 3.0T engine is equipped with a plastic thermostat housing. While sufficient when new, its plastic construction is prone to degradation over time. After enduring thousands of heat cycles and consistent exposure to chemical-rich antifreeze, the housing becomes brittle and begins to crack. Once the material is compromised, it can lead to a significant coolant leak, which, if left unchecked, may result in overheating and severe engine damage. This is especially problematic for the supercharged 3.0T, where maintaining proper engine temperature is critical for both performance and longevity. Our engineers set out to fix this issue with the ECS Billet Aluminum Thermostat Upgrade, engineered for enhanced durability, efficiency, and reliability. This precision-machined 6061 T6 billet aluminum thermostat replaces the failure-prone factory plastic housing, addressing one of the most common failure modes for all 3.0T supercharged engines. Designed with both performance and longevity in mind, this thermostat is the ultimate solution to overheating and coolant leaks, offering peace of mind in everyday driving and high-performance applications.

In 2023, I began searching for a new high-performance, track-capable vehicle to replace my MK6 GLI, which had since been converted into an autocross toy. I found this low-mileage 2018 B9 S4 Prestige with almost every available option at an unbelievable price, and it checked all the boxes for me. I've always felt that the aggressive styling of the B9 generation doesn't need much to stand out. However, the goal for this build was a stealthy, OEM+ look. To achieve that, I replaced the Audi rings, S4 emblems, fender badges, lower bumper grilles, window trim, bumper reflectors, and mirror caps with gloss black versions. The front grille was then swapped for an RS-style gloss black piece, and our black front lip and rear diffuser completed the look. For wheels, I partnered with Rohana Wheels to spec out a perfectly suited set of RFX13s in gloss black. Under the hood, the car boasts a full lineup of ECS performance upgrades: intake system, turbo inlet and outlet, intercooler, charge pipes, post-throttle pipes, catch can, diverter valve spacer, and more. It's lowered on our ECS lowering springs, which pair beautifully with the OEM adaptive suspension. The car is tuned by our friends at Integrated Engineering, running their Stage 2 ECU and TCU tunes, making the car absolutely RIP while maintaining all factory safety protocols. It sounds just as good as it drives, thanks to a higher-flowing cat, Supersprint downpipes, and an ECS X-pipe, all while retaining the factory valved mufflers. This car has been used in the development of several new products here in R&D, with more exciting upgrades to come.

From the minds that engineered them to the machines they personally drive, these are our top product picks, straight from our enthusiast engineers! As die-hard automotive lovers themselves, our team pours their passion and expertise into every design. If it's not good enough for our own vehicles, you won't find it here. Get a glimpse into the parts we trust and install on our personal rides � we truly are enthusiasts built!

When the 8V RS3 came out, it quickly became one of the best performing "hot compact sedans" on the market! Naturally we had to get an 8Y RS3 into the shop for R&D and oh boy did we! Our engineering team went to work fast and made sure that everything we developed was that perfect OEM+ look and feel. We reviewed an 8Y RS3 earlier this year with our full catalog of ECS Upgrades and fell in LOVE! We fell so much in love with it and decided to purchase one, bolt on $20,000+ worth of top performance mods in the aftermarket industry and you guess it! LAUNCH A SWEEPSTAKES where YOU could take this beauty home! Plus we are giving the winner $10,000 additional to help with those pesky taxes! We partnered with top names in the performance and maintenance aftermarket industry to bring you the best 8Y RS3 as decked out as possible! Check out all the performance products from APR, BILSTEIN, AWE, Integrated Engineering and APEX Wheels below. Also dont forget we topped off all fluids with LIQUI MOLY and swapped out filters with HENGST Filters our preferred filtration supplier!

Unlike dual-pulley setups that require multiple modifications and a lengthy installation process, this single overdriven crankshaft pulley delivers greater performance benefits in a simpler package. With increased boost pressure and supercharger RPM, optimized belt engagement, and compatibility with most Stage 2 ECU tunes, our 207mm crank pulley upgrade provides an efficient path to unlocking your engines full potential. This pulley bolts directly over the existing crankshaft pulley, eliminating the need to press on a smaller supercharger pulley saving you time and effort. Unlike smaller supercharger pulleys that can cause belt slippage, this crank pulley upgrade eliminates that risk, delivering consistent and reliable performance. Our 207mm crank pulley upgrade retains the factory crank pulley damper for the accessory drive, preserving the balance and longevity of your engine components.

The B8 S4 was purchased because of ECS after maximizing a B5 A4 (fully swapped to S4 "AS4" drift car only to keep destroying multiple axles per event due to making over 500WHP and 500WTQ on the 2.7t. When ECS Tuning reached out asking if I had access to a B8 S4 Manual car to test their new bolt on RWD kit, I immediately found the cheapest buy-it-now priced S4 in the country and bought it. RWD kit was on within 12 hours of owning the car. The car has be first of its kind most of its life with me. Made great power on the 3.0T, just hated the sound of a V6 in race form. After running into limitations within the ECU/Chassis harness when trying to delete ABS. An LS3-based V8 was built and swapped in, hoping to focus on the chassis knowing I had a solid drivetrain. With traditional transmissions, the rear diff swap was required as the quattro cars from Audi turn the rear differential in the opposite direction of conventional RWD cars. A Ford 8.8 IRS was swapped in using OEM axles in the rear. Now for the 3rd time in the chassis's life I am swapping back to an Audi Motor and transmission as I have a good handle on chassis set up/angle kit. I am building a EA888 2.0t out of a B8 A4 with the power goals of 800+ WHP. This German Hot Rod is my new AS4 Drift car. I opened my own Euro Repair and Performance Shop in the summer of 2024. We have started building several EA888's for clients, I've come to love the 2.0t engines. Wanting to go back to an All Audi Drift Program, the EA888 just made sense.

Enjoy your B7 S4 with the most engaging, race-inspired, performance catback exhaust system. Intoxicating exhaust notes fuel your desire to push your engine to its limits with every ounce of power and every engine revolution. Experience your driving passion with our ECS Catback Exhaust System The full exhaust system is made from high-quality brushed T304 stainless steel with TIG welded joints for an exceptional look and durability. Exhaust gases are channeled through the integrated x-pipe, your choice of either a resonator or a resonator delete section, and then to the 3-chamber, in-house designed mufflers. With this system, you, the driver, are in control of where the exhaust gases go from here. Each system is available with your choice of either chrome or black chrome, clamp-on, "pivoting" exhaust tips that accentuate this expertly assembled exhaust system with a perfect finish. With clamps securing each tube in position and allowing multiple degrees of rotation in combination with our ECS Swivel Exhaust Tips, you have the ability to fine-tune the location of each component.

Protection of your undercarriage is vital. Despite old and late-model Euros incorporating complex underbody componentry, only flimsy plastic belly pans limit catastrophic damage to the underside of your car. Between giant potholes, speed bumps, and inclement weather, your vehicle is exposed to a variety of impacts that can ruin your engine and transmission oil pan, core support, or other critical components.

We couldn't be happier to work with our good friend Zach Jobe and his E46 M3 CSL Clone project. Not only do we love seeing the E46 M3 still getting the love and attention from enthusiasts 20 years after its production end, we are also in love with Zach's custom touches that make his dream a reality. We helped refresh every corner of his E46 M3, see the build list here and check out the videos on YouTube!

Valve covers do exactly as the name suggests, keeping the camshaft & valves covered from outside influence while keeping engine oil in for proper lubrication. If you have a cracked or warped valve cover, common issues include engine oil leaks and, in extreme cases, a rough idle due to an improper seal of the internal engine. Be sure to replace your damaged valve covers and relieve worry about excessive leaks ruining your day.

Are you spending some quality time with your car this season? Equip yourself for all projects with Schwaben Tools! We offer an extensive line of standard & European specialty tools for your collection, as well as high quality items to help keep your car cleaner while getting work done and improve the DIY experience for both you and your tools.