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Equal Length Header 02-14 WRX 04-21 STI

$1,499.00 $1,274.15

  • SKU: PSP-EXT-055
  • Quantities low - Order Soon!

Equal Length Header 02-14 WRX 04-21 STI

$1,499.00 $1,274.15

  • SKU: PSP-EXT-055
  • Quantities low - Order Soon!
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Overview

Create a smooth-sounding exhaust note while increasing horsepower and torque with the PERRIN Equal Length Header. Available in both Standard 1.5" or 1.625" Big-Tube Primaries.

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Designed for Power

The PERRIN Equal Length Header comes with collectors that have been designed for better exhaust flow while allowing the headers to be constructed with increased accuracy. The improved exhaust flow and more precise construction increase power and reliability, while the low-profile design allows for excellent ground clearance.

No Tuning Required

Increase horsepower and torque without ECU recalibration or tune! This part is designed and tested to work safely on your vehicle without any tuning required! However, more power can be gained with proper ECU tuning! Confirm any tune or recalibration you add is specific for ALL modifications added to the vehicle. Questions? Contact [email protected].

Equal Length Design

The equal length design of the PERRIN Header produces smooth, 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 the factory up-pipe, our header will also mate with an aftermarket up-pipe that fits the factory header and turbo, as well as any rotated turbo kits compatible with the factory header.

Perfectly Sized for More Horsepower

You won't see grossly over-sized tubing to make our header "look" impressive, this just slows exhaust gas flow and reduces response. PERRIN headers use 1½" and 1⅝" (big-tube) primary tubing that is expanded at the flange to fit the Subaru exhaust port size. These tubing sizes are perfectly designed for cars up to about 400 wheel horsepower and above 400 wheel horsepower, respectively. You can see from our dyno graphs that there is a significant gain in horsepower and torque across the entire RPM band compared to an OEM Subaru header.

Flanges & Port Matching

PERRIN Flanges are CNC machined from 304 stainless steel and counterbored on the backside 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. The tubes are expanded inside the flanges for a perfect fit and smooth flow of exhaust gases to the tubes.

Install Kits

The Header Installation Kits include all the necessary OEM replacement parts required for the installation of PERRIN Equal Length Headers.

Sound

Due to 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.

Finish

PERRIN Equal Length Headers feature a brushed stainless steel finish.

Oil Pan

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.

2.0L WRX engines will need the 2.5L STI oil pan install kit. Please shop our installation kits for more information.

Product Details

  • Material 304 Stainless steel
  • Finish Brushed
  • Outer Diameter - Normal 1½"
  • Outer Diameter - Big Tube 1⅝"

PSP-EXT-055 = Equal Length Headers
PSP-EXT-056 = Big Tube Headers

  • (1) PERRIN E4-Series Header
  • (1) Anti-seize grease packet
  • (1) PERRIN License Plate Frame
  • Warranty & Instructions

NOTE:

2002-2005 WRX - Yes, requires oil pan with header cutout and oil pickup tube
2002-2005 WRX Automatic Transmission - Yes, requires modifications to radiator and radiator line to the transmission
2006-2007 WRX - Yes, requires 2002-04 WRX oil cooler assembly and oil feed pipe
2004-2008 Forester XT - Yes, requires oil pan with header cutout, oil pickup tube, 2002-04 WRX oil cooler assembly, and 2002-04 WRX oil feed pipe
CSF Radiator with Built-in Oil Cooler - No
KILLERB Cast Oil Pan - No

  • 2004 Subaru Forester XT
  • 2005 Subaru Forester XT
  • 2006 Subaru Forester XT
  • 2007 Subaru Forester XT
  • 2008 Subaru Forester XT
  • 2009 Subaru Forester XT
  • 2010 Subaru Forester XT
  • 2011 Subaru Forester XT
  • 2012 Subaru Forester XT
  • 2013 Subaru Forester XT
  • 2005 Subaru Legacy GT
  • 2006 Subaru Legacy GT
  • 2007 Subaru Legacy GT
  • 2008 Subaru Legacy GT
  • 2009 Subaru Legacy GT
  • 2005 Subaru Outback XT
  • 2006 Subaru Outback XT
  • 2007 Subaru Outback XT
  • 2008 Subaru Outback XT
  • 2009 Subaru Outback XT
  • 2004 Subaru STI
  • 2005 Subaru STI
  • 2006 Subaru STI
  • 2007 Subaru STI
  • 2008 Subaru STI
  • 2009 Subaru STI
  • 2010 Subaru STI
  • 2011 Subaru STI
  • 2012 Subaru STI
  • 2013 Subaru STI
  • 2014 Subaru STI
  • 2015 Subaru STI
  • 2016 Subaru STI
  • 2017 Subaru STI
  • 2018 Subaru STI
  • 2019 Subaru STI
  • 2020 Subaru STI
  • 2021 Subaru STI
  • 2002 Subaru WRX
  • 2003 Subaru WRX
  • 2004 Subaru WRX
  • 2005 Subaru WRX
  • 2006 Subaru WRX
  • 2007 Subaru WRX
  • 2008 Subaru WRX
  • 2009 Subaru WRX
  • 2010 Subaru WRX
  • 2011 Subaru WRX
  • 2012 Subaru WRX
  • 2013 Subaru WRX
  • 2014 Subaru WRX
5 Year Warranty

PERRIN Performance warrants to the original purchaser that all PERRIN products will be free from defects in material and workmanship within a sixty (60) month period from the date of purchase. *Some exclusions apply

Proposition 65

warning.pngWARNING: Cancer and Reproductive Harm
www.P65Warnings.ca.gov

Off Road Use Only

This product is legal in California only for racing vehicles which may never be used upon a highway. Check your local and federal laws prior to installation.

Estimated DIY Install Time: 1 hour
Email Our Tech Department: [email protected]
Download Instructions
Gallery

Installation Gallery

PERRIN STI Equal Length Header

Updated from July 2010 post with new pics and new…

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Equal Length Header 02-14 WRX 04-21 STI
$1,274.15
  • SKU: PSP-EXT-055
  • Quantities low - Order Soon!
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