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-S..
Create a smooth sounding exhaust note while increasing horsepower and torque with the PERRIN E4-Series Equal Length Header.2002-2005 WRX - Yes, requires oil pan with header cutout and oil pickup
tube, and custom modification to the radiator line to the transmission.2002-2005 WRX - Automatic Transmi..
improve a known failure point with a set of high grade PERRIN Endlinks!
*Why you need these endlinks*
The OEM WRX plastic endlinks are week and will flex greatly after
installing a stiffer aftermarket swaybar. This flexing makes your
stiffer aftermarket swaybar feel less responsive. PERRIN endl..