Perrin Big Tube Equal Length Header Subaru Wrx Or Sti 2002-2013 on 2040-parts.com
San Angelo, Texas, US
The equal length design of the PERRIN header, produces smoother more balanced exhaust pulses flow from the head to the turbocharger giving you the best of two worlds. Quicker turbo response as well as more horsepower and torque throughout the entire RPM band. While designed to fit to the factory up-pipe, our header will mate with an OEM or aftermarket up-pipe, as well as any rotated turbo kits compatible with the factory header. You wont see grossly, way over sized tubing to make our header LOOK better. That just slows down exhaust gases and looses response. The PERRIN Big Tube header uses 1.625" primary tubing that fits the Subaru exhaust port size. Our larger diameter header was designed for cars making 500+ wheel HP to not sacrifice low end power on cars with big aftermarket turbos installed. For those looking for more HP from their stock turbo to slightly upgraded turbo, we suggest to look at our Regular WRX/STI equal length header. PERRIN Flanges are CNC machined from 304 stainless steel and counterbored on the back side to make smoother transitions. Flange ports sized properly to ensure exhaust coming out of the head has a smooth unobstructed path to the tubes. The ports are not over ported which causes gaskets to burn out quickly. Because of it equal length design, the PERRIN header will alter the tone of your exhaust. The exhaust pulses from the engine are equalized and spread out producing a smoother, more refined sound. Most headers collect on the passenger side of the engine, and due to space constraints, are not equal length, compromising exhaust flow. Because we use the added room provided by the oil pan (only on 2.5L turbo pans), we can create a smooth transition of the header primaries to the collectors, and collectors to up-pipe, providing more power and torque then the competition. 2002-2005 WRX - Requires STI type oil pan and oil pickup. 2006-2007 WRX - Requires modification to the oil cooler 2004-2007 STI - No modification 2008-2013 WRX - No modification 2008-2013 STI - No modification Equal Length Design
Sizing
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Oil Pan
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