Shop manual · Vol. 2026
WRX and STI builds, wrenching guides, and parts moving out of the shop. Every generation, GC to VB.
A clean blobeye STI turned dedicated track-day car: built EJ257 short block, coilovers, cage, and proper cooling.
A Stage 1 map is the best power-per-dollar in the Subaru world. What the tune actually changes, what it doesn't, and why an off-the-shelf map is only a starting point.
The definitive bolt-on recipe for a GD WRX or STI: which parts, in what order, and the wheel numbers to actually expect — without the forum fantasy figures.
Doing EJ25 head gaskets right: engine-out method, MLS gaskets, resurfacing, and the torque sequence that keeps them sealed.
The 105k service on any EJ-powered WRX/STI: belt, pump, tensioner, idlers, and getting all the cam marks lined up without panic.
Sluggish spool, weird idle, fuel trims out of range — before blaming the tune, pressure-test the intake tract.
Used — shafts tight, no play
Used — rebuilt, new seals
Used — straight, curb rash on two