GrimmSpeed J-Pipe GESI Catted V2 (15-21 WRX)

304 stainless steel construction Thick 1/2" flanges for added durability and longevity Built-in GESI catalytic converter that is standard on all V2 J-pipes Cast steel collectors that are extremely strong with low restriction for optimized flow New 2-piece design makes for a much easier solo installation while saving costs with shipping Standard 3rd O2 bung allows for the use of an aftermarket wideband O2 gauge  Designed with a grounding strap mount to retain all factory functionality  Includes new custom stainless turbo studs  Includes new gaskets and hardware for the installation   PERFORMANCE FEATURES: Smooth bends provide an unobstructed exhaust flow  3" piping diameter  Improves the horsepower and torque Improves the throttle response while reducing the turbo lag Helps generate a race-inspired sound Ideal for enthusiasts who want more performance from their daily drivers or weekend show cars Ideal for those with track-dedicated race cars