Fuel Injector Top and Side Feed O-Rings WRX / STI (2002-2007) Variations:Side Feed Injector O-Ring Set WRX/STI (2002-2007) X-Pipe Balance Tube: An X-pipe

X-Pipe Balance Tube: An X-pipe balance tube is used to equalize and evenly distribute exhaust pulses which minimizes exhaust drone and increases flow and performance

and street Evos

The best part is that with an AEM extension harness

and plumbing

The GrimmSpeed new and improved manual boost controller is renowned as the most refined manual boost controller on the market

Fuel Injector Top and Side Feed O-Rings WRX / STI (2002-2007) Variations:Side Feed Injector O-Ring Set WRX/STI (2002-2007) X-Pipe Balance Tube: An X-pipeHave you smelled fuel vapors coming through the heater vent on cold mornings? Maybe just caught a whiff of gasoline vapor when you open the hood? Have you checked your injector O rings recently? These replacement fuel injector O rings will prevent fuel leaks and are a good idea when swapping injectors. These kits fit all OEM and OEM replacement injectors including Deatschwerks. Note: Be sure whether you have top feed or side feed injectors before you