Timing Chain Cover FA20F 22794AA010 A 15 to 25% reduction

A 15 to 25% reduction in shift throw in each direction has been achieved while retaining the quality and fitment of the original shifter

STI EJ207 MY01-02

The AVCS oil control valves (solenoids) control the direction of oil flow into and out of a series of chambers inside the sprocket in order to advance or retard the timing as necessary

Reduced piston acceleration and increased dwell time improves breathing and combustion efficiency

One version used on 6MT applications between MY01 and MY06 may be slightly heavier duty

Timing Chain Cover FA20F 22794AA010 A 15 to 25% reductionAluminum timing chain cover for FA20 DIT applications such as WRX. The timing cover contains the oil pump on these applications and should be replaced in the event of a serious bearing failure or other failure generating significant metallic debris. Manufacturer Part No: 13108AA141 What it fits: WRX MY15 21 Forester XT MY14 18