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The Mishimoto Performance 3-inch stainless steel cat-back exhaust for 2015+ Subaru WRX/STI is a four-piece TIG-welded system with quad 3.5-inch staggered double-wall polished tips. Engineered for improved flow, oval mufflers reduce highway drone while delivering an aggressive tone. Dyno testing on a 2015 WRX CVT showed up to 9 whp and 8 wtq gains on 93 octane; the system installs in under an hour and pairs with most aftermarket downpipes.
Mishimoto 2015 Subaru WRX 3in Stainless Steel Cat-Back Exhaust
