PERRIN E4-Series Equal Length Header 1.5" Primaries | Multiple Subaru Fitments (PER PSP-EXT-055)

WRX/STI E4-Series Equal Length Header by Perrin Performance

The equal length design of the PERRIN E4-Series 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 to the factory up-pipe, our header will also mate with an aftermarket up-pipe that fits factory header and turbo, as well as any rotated turbo kits compatible with the factory header.

Also included are PERRIN Flanges, 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. The tubes are expanded inside the flanges for a perfect fit and smooth flow of exhaust gases to the tubes

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 about 400 WHP. 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

Features

• 304 Stainless Steel Construction
• Equal Length Design
• 1.5in Primary Tubing
• CNC Machined Flanges
• Brushed Stainless Steel Finish
• Header Gaskets Available (Optional)

Benefits

• Better Exhaust Flow
• Increase in HP and Torque
• Low-Profile Design

Please Note:

• Certain WRX and Forester models require alterations to oil pan and/or radiator to fit properly
• 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.
• WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

Applications

• 2002 - 2005 Subaru Impreza WRX (requires oil pan w/ header cutout, oil pickup tube, modification to radiator line)
• 2006 - 2007 Subaru Impreza WRX (requires 2002-04 WRX oil cooler assembly, oil feed pipe)
• 2008 - 2014 Subaru Impreza WRX
• 2004 - 2014 Subaru Impreza WRX STI
• 2015 - 2019 Subaru WRX STI
• 2004 - 2008 Subaru Forester XT (requires oil pan with header cutout, oil pickup tube, 2002-04 WRX oil cooler assembly, oil feed pipe)
• 2009 - 2013 Subaru Forester XT
• 2005 - 2009 Subaru Legacy GT

What's In The Box?

• 1 - PERRIN E4-Series Equal Length Header
• 1 - PERRIN License Plate Frame
• All Necessary Hardware
• Installation Instructions
• Warranty Information
• Stickers

Instructions

• Click Here for Instructions

Warranty

• Perrin Performance 5 Year Limited Warranty