STI 6-Speed Drivetrain Swap into a 2002 Subaru WRX A complete STI 6-speed drivetrain swap into a 2002 WRX replaces the five-speed with the STI gearbox, axles, R180, hubs, brakes, and 5x114.3 wheels. The short path keeps the 5x100 hubs...
Subaru WRX and STI Wheel Offset and Bearing Load Subaru WRX and STI wheel offset is the distance from the rim centerline to the hub mounting face, and it only means something next to the width. A lower number moves...
Subaru WRX and STI Cooling System The cooling system on a turbo Subaru WRX or STI holds temperature with Subaru coolant mixed at 50 to 60 percent, a 137 kPa cap on the radiator, and a 108 kPa cap on...
Clutch and Flywheel Guide for the Subaru WRX and STI Choosing a clutch and flywheel for a WRX or STI starts with torque. Horsepower and the stage number on a tune do not tell you whether the disc will hold....
Subaru WRX and STI Differentials A WRX or STI has three differentials, and they do not do the same job. The center unit splits torque between the front axle and the rear axle. The front and rear units then split...
Will a Muffler Delete Cause a Check Engine Light on a WRX? A muffler delete on a 2015-2021 WRX is an axleback. An axleback is a bolt-on behind the catalytic converter: no tune, and no check engine light. The light...
theHood Scoop Upgrades for the 2015-2021 WRX There is no single best hood scoop for the 2015-2021 WRX. A full replacement is the OLM A1 at $369.00, currently unavailable, or the Hyperflow at $371.00 if you can live with a...
Maintenance for a Subaru WRX or STI Maintenance for a Subaru WRX or STI is the schedule published for that VIN, done as a drain and fill with the fluid that gearbox or differential calls for. A flush machine, an...
theSuspension Upgrades for the 2022+ WRX A suspension upgrade on the 2022+ WRX is a choice between shorter springs on the factory dampers and a coilover that replaces both. Springs lock in one ride height. Coilovers add height and damping...
