- 2002-2005 WRX
- 2006-2007 WRX
- 2008-2014 WRX
- 2004-2007 STi
- 2008-2014 STi
- 2015-2020 STi
- 2004-2008 Forester XT
- 2009-2013 Forester XT
- Brand: Perrin Performance
- Manufacturer's Part Number: PSP-EXT-055
- Disclaimer: For Off Road Use Only
- Manufacturer's Warranty: 5 Years. Please see Perrin's website for full details.
- We ship internationally! Please email us for international shipping quotes.
- Off Road Use Only?: For Off Road Use Only
- Condition: New Product
Updated Design - What's new
The new PERRIN Equal Length Headers come with newly designed collectors for better exhaust gas flow and allow the headers to be constructed much more accurately. The improved collector construction makes for higher reliability and extended longevity. Additional bends and smoother routing increases horsepower gains compared to previous design. The new lower profile design also allows for better ground clearance.
Equal Length Design
The equal length design of the PERRIN header produces smoother, more balanced exhaust flow from the heads 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.
Perfect size for more HP
You won't see grossly over sized tubing to make our header look better as this just slows exhaust gases down and loses response. This header uses 1.5" primary tubing that is expanded at the flange to fit the Subaru exhaust port size. This size tubing is perfectly designed for cars up to 400WHP. You can see from our dyno graphs that even on cars with well over 400WHP, there is a significant gain in horsepower and torque across the entire RPM band when compared to a stock header.
Flanges & Port Matching
PERRIN Flanges are CNC machined from 304 stainless steel and counterbored on the back side to make smoother transitions. Flange ports are 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 would cause gaskets to burn out quickly.
Because of its 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. A byproduct of the equalization is a significant reduction in the volume of your exhaust sound. Some describe the sound as being similar to an inline four cylinder engine exhaust.
PERRIN headers feature a brushed stainless steel finish.
Most headers collect on the passenger side of the engine, and due to space constraints, are not equal length and compromise 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.
If installing on a 2.0L WRX engine, you will need the 2.5L oil pan install kit.
2002-2005 WRX *Requires oil pan with header cutout and oil pickup tube.
2006-2007 WRX *Requires 2002-04 WRX oil cooler assembly and oil feed pipe.
2004-2008 Forester XT *Requires oil pan with header cutout, oil pickup tube, 2002-04 WRX oil cooler assembly, and 2002-04 WRX oil feed pipe.
2009-2013 Forester XT Yes, no modification
2004-2007 STI Yes, no modification
2005-2009 Legacy GT Yes, no modification
2008-2014 WRX Yes, no modification
2008-2014 STI Yes, no modification
2015-2016 STI Yes, no modification
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