Sti performance exhaust diameter. The kit helps prevent leaks and improves your car’s overall efficiency. 36" at Y with 4. Upgrade your 2015-2021 Subaru WRX STI with Invidia, Nameless & HKS performance exhausts. 5 or 3? Sep 21, 2008 · What are the physical differences between stock WRX exhaust and stock STI exhaust for the 2004-2005 models, including number of cats, dimensions from turbo back and axle back, etc? Discover high-quality exhaust systems, headers, and catbacks for your 2015-2021 STI. I am really interested in the Fujitsubo, although I think that it is the same diameter piping as the stock exhaust but with a way better sound. 5"? A simple search would have yielded many threads with the answer to your question. That said, it’s unlikely it’ll hurt anything or really be any major hinderance at all if you’re still on a stock turbo, or even a small turbo upgrade from a performance standpoint. 38" at Y with 3. 6" quad tips or 4. Shop oem parts now!. What We Like: This kit Enhance your ride with premium Subaru STI exhaust systems designed for the 2015-2018 models, including muffler delete, axleback, and catback options for maximum performance. Each aftermarket exhaust comes with the maximum horsepower and torque available throughout the entire RPM range. Oct 19, 2008 · Can anyone verify that the STi inner muffler diameter is 2. Borla® is proud to offer performance exhaust systems for the 2020 Subaru WRX STI for more HP, and aggressive sound, as well as a million-mile warranty on all Subaru WRX STI exhausts. Equip cars, trucks & SUVs with 2017 Subaru WRX STI Performance Exhaust System Kit from AutoZone. That leads to better performance. This kit helps seal your exhaust system properly. 3" tips 3. Find genuine Subaru STI Exhaust System for your car at SubaruOnlineParts. Select your WRX STI sub-model and engine size to find the best exhaust for your WRX STI. It minimizes backpressure while maintaining exhaust velocity for responsive low-end torque. Improve sound, response, and reliability with our Subaru-specific parts. Jul 6, 2016 · I know the STI performance exhaust is the least noisy catback option but I'm unable to find out the diameter and flow characteristics of this exhaust. Jan 26, 2026 · When evaluating options for a Subaru STI exhaust, consider these technical and experiential factors: A 3-inch diameter is standard for serious performance applications. Explore our collection of Subaru STI performance parts, from chassis bracing to essential mods, crafted to elevate your driving experience. Nov 13, 2021 · 2. 64" dual tips. 75" exhaust down to 2. Buy the power and sound you demand for your Subaru WRX STI Exhaust. Jun 30, 2023 · The majority of the selection of cat-back exhaust systems that SubiSpeed offers will usually have 3-inch main piping diameter or close for your 2015 Subaru WRX /STI. Boost power, unleash epic sound, perfect fit. Mounted behind the catalytic converter, the STI Performance Exhaust System provides a smooth mandrel bend construction to help reduce exhaust flow restrictions, allowing the engine to "breathe" more efficiently. The exhaust system includes a free-flowing center pipe after the catalytic converter that splits into two pipes and mufflers with engraved STI tips. Jan 30, 2005 · What is the stock exhaust piping size? 2. Aug 31, 2021 · Yes, since the diameter would get smaller it would create a bit of backpressure. Borla offers performance exhaust systems with a variety of sound levels to ensure your experience fits your specific needs. Purchase an Invidia Q300, 3" exhaust down to 2. We sell discount performance parts & accessories online. 2. I'm worried that even the Q300 will be a bit loud for my tastes, especially after the downpipe upgrade. Shop now! Jun 25, 2025 · Are you looking to upgrade your Subaru WRX, XT, STI, or GT’s exhaust system? This Exhaust Manifold Gasket Kit is what you need! It includes all the gaskets you need for your up and down pipes, and the manifold. Purchase an Fujitsubo RM+C Quad tip exhaust or dual tip. Get Yours Today! We have the best products at the right price. kun dll egb sqs yrm rkh fwy owk ulj fzl gmk vnq ytd bac jru