Part: # MMEXH - WRX - 15. Tired of the lackluster stock cat - back exhaust? The Mishimoto Performance Stainless Steel Cat - back is here to transform your driving experience. It allows the exhaust system to breathe freely, boosting horsepower, torque, and delivering a deep, rich exhaust tone. After extensive testing, Mishimoto's engineers selected oval mufflers. These mufflers not only prevent annoying highway drone but also give an aggressive exhaust note. In dyno tests on a 2015 WRX with CVT using 93 - octane fuel, it achieved up to 9 whp and 8 wtq gains while keeping safe AFRs on a stock tune (check dyno chart in additional images). Installation is a breeze, taking under an hour. It features quad 3.5” staggered double - wall polished tips for a stylish look. This exhaust roars with an extremely aggressive turbo and exhaust tone during acceleration and boost. It's a four - piece design made of precision TIG - welded 304 Stainless Steel, ensuring a smooth exhaust flow from the 3.0” 2 - bolt exhaust flange through the 2.25” y - section. It comes with two 2.25” V - Band clamps, a 3” exhaust band clamp, a new 3” 2 - bolt flange gasket, and all stainless - steel hardware, so you'll never have to worry about rust. For 2015 WRX owners, it pairs perfectly with the Mishimoto Performance Downpipe. Proudly made in the USA and backed by the Mishimoto Lifetime Warranty. Features: Direct fit for 2015+ Subaru WRX & STI; Aggressive turbo and exhaust tone; Oval mufflers to prevent highway drone; Quick installation; Quad 3.5” polished tips; Full 304 stainless - steel construction; Dyno - proven power gains; Perfect TIG welding; Maintains exhaust velocity; Compatible with various downpipes; Made in the USA; Lifetime warranty. Note: If you're using a stock j pipe or downpipe, the GrimmSpeed Subaru Stock DP to Aftermarket 3 in. Catback Adapter p/n 077046 is required.
Using your Mishimoto Cat - Back Exhaust is simple. First, make sure your vehicle is parked on a flat, stable surface and the engine is cool. The exhaust comes with all the necessary hardware, so you can start the installation process. It should take less than an hour to install. Just follow the included instructions carefully. During normal driving, enjoy the aggressive turbo and exhaust tone, especially when accelerating and under boost. As for maintenance, since it's made of 304 stainless steel, it's quite resistant to rust. However, it's a good idea to periodically check the hardware, like the V - Band clamps and bolts, to make sure they're tight. If you notice any rattling or unusual noises, it could mean a part has come loose. If you're using a stock j pipe or downpipe, remember that you'll need the GrimmSpeed Subaru Stock DP to Aftermarket 3 in. Catback Adapter p/n 077046. This exhaust is designed to work well with the Mishimoto Performance Downpipe, so if you're looking for even better performance, consider pairing them together. And with the Mishimoto Lifetime Warranty, you can have peace of mind knowing your investment is protected.
