GrimmSpeed 08+ WRX/STi AOS - Manual (Page 2)

1. Install AOS fittings into AOS body. Place a drop of engine oil onto o-ring to ease installation.
Remove oil cap and install GrimmSpeed AOS so that fittings face towards the master cylinder.
Be careful to NOT over tighten the AOS into the oil fill.
2. Remove turbo to intercooler mounting bolts.