Mishimoto 2015 Subaru WRX 3in Stainless Steel Cat-Back Exhaust

If you're looking to give your 2015-2021 Subaru WRX or WRX STI a more aggressive sound and feel, this Mishimoto Performance Cat-Back Exhaust is a solid option. The stock exhaust system often leaves owners wanting more, and this cat-back is designed to fix that. It allows your exhaust system to breathe more freely, which can lead to noticeable gains in horsepower and torque, all while giving you that deep, rich exhaust tone you're after.

Mishimoto engineers put a lot of thought into the muffler design, opting for oval mufflers that are specifically chosen to prevent that annoying highway drone, even while delivering an aggressive sound under acceleration and boost. They even dyno-tested this system on a 2015 WRX with a CVT transmission, seeing gains of up to 9 horsepower and 8 foot-pounds of torque on a stock tune with 93 octane fuel. The system is built from 304 stainless steel with precision TIG welds, ensuring it's well-built and corrosion-resistant. It flows smoothly from the 3-inch flange down to a 2.25-inch Y-section, and it features four staggered, double-walled polished tips that look sharp.

This cat-back comes as a four-piece kit and includes everything you need for installation, like V-band clamps, a band clamp, a new flange gasket, and all stainless steel hardware, so you won't have to worry about rust down the road. It's designed to install in under an hour and mates well with most aftermarket downpipes, including Mishimoto's own Performance Downpipe, for even more potential. Plus, it's proudly made in the USA and backed by Mishimoto's Lifetime Warranty.