A smooth and unrestrictive exhaust path after the header is key to engine power and performance. With smooth bends and larger diameter tubing, the PERRIN Performance overpipe increases flow without adversely effecting overall exhaust velocity.
No Restriction Construction
The PERRIN Overpipe is made from 2.5, 304 Stainless Steel and assembled with precision TIG welding. Unlike the factory 2.118 tubing with its sharp, crimp type bends throughout, the PERRIN Overpipe is CNC mandrel bent for smooth air flow allowing for maximum horsepower.
PERRIN Flanges are CNC machined from 1/2 thick, 304 stainless steel and counterbored on the inside for a smooth transitions. When bolted to a PERRIN header or PERRIN Frontpipe you will see a perfect transition between the flanges ensuring no loss in air flow.
The PERRIN over pipe comes with 2 new OEM exhaust gaskets for a fresh new seal.
Add an easy 3whp to your BRZ/FR-S with the PERRIN Overpipe. This dyno chart shows BRZ with our 2.5 catback and 2.5 catless front pipe installed. Then another run with the PERRIN Overpipe is installed showing a gain of 3whp.