The new PERRIN E4-Series Big-Tube Equal Length Header comes with collectors that have been designed for better exhaust flow while allowing the headers to be constructed much more accurately. The improved exhaust flow and more precise construction increases power and reliability. The new E4-Series also has a low-profile design, allowing for lots of ground clearance.
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.
|2002-2005 WRX||*Requires oil pan with header cutout and oil pickup tube.|
|2002-2005 WRX Automatic Transmission||Yes, requires modifications to radiator.|
|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|