The PERRIN 02-07 WRX & STi 1-piece catted downpipe is crafted from 304 stainless steel (brushed finish) and uses mandrel bent 3" tubing insuring a streamlined exhaust flow and crisp boost & throttle response when needed. The PERRIN downpipe also features a 200 cell per inch metallic substrate catalytic converter that is 49 state legal to keep you emissions friendly while improving power at the same time. (Note: NOT CARB legal) Unlike the OEM ceramic brick style catalytic converter, PERRIN converters have high flow rates and are guaranteed to take the extreme heat produced by high horsepower Subaru's. The PERRIN downpipe also has a signature split pipe mouth design to divert the wastegate exhaust gases away from the exhaust coming from the turbine. PERRIN downpipes use thick laser cut stainless steel flanges that will not warp or leak during extreme driving and mate perfectly with stock or aftermarket components.
Note: This downpipe includes hardware and a 3" exhaust gasket. A 'turbo-to-downpipe' gasket is not included. (See recommended tab)