Perrin Red Recirculation Blow Off Valve Kit For Subaru 02-07 WRX / 04-20 STI batteries this mini pack is a

this mini pack is a progressive overload that will ride better and provide 1-3 inches of rear lift if one or both of the spacer blocks are removed

5" CNC-machined billet Aluminum lower spring spacers and hardware

Factory wheels cannot be reinstalled

Installers can test for condensation by turning the engine on

Perrin Red Recirculation Blow Off Valve Kit For Subaru 02-07 WRX / 04-20 STI batteries this mini pack is adjustable relief pressure and flow control make fine tuning on the fly simple and quick with the PERRIN BOV BPV. HIGH FLOW With large 1. 225" inlets and outlets, the PERRIN BPV is sized perfectly to relieve any amount of boost pressure without fear of compressor surge. Don't be fooled by giant oversized bypass valves, these inlet and outlet sizes were chosen to ensure the perfect balance of flow and to maintain boost in your system, without ruining