The FA24 engine in the 2022+ WRX now uses an electronically controlled factory diverter in place of the pneumatic bypass valve found on all previous turbo Subaru engines. This is controlled by the...
The FA24 engine in the 2022+ WRX now uses an electronically controlled factory diverter in place of the pneumatic bypass valve found on all previous turbo Subaru engines. This is controlled by the...
The factory BPV (bypass valve) has a couple of key shortcomings in construction and operation. First of all, tuned engines running high boost also produce a lot of heat in the charge air. Because the...