AMS Performance 4 Port Boost Control Solenoid Kit – For Alpha R35 GTR Turbo Kits

The AMS Performance R35 GT-R 4 Port Boost Control Solenoid Kit When installing a new turbo system to your GTR, you will need a more effective method to control higher boost levels than stock. Allowing for much higher resolution than the factory solenoid, this kit will allow boost to be controlled to a much finer degree. We designed this BCS kit to be as robust and high quality as possible while still being simple to plumb and install. Allowing for a wider range of peak boost control, the 4 port boost control solenoid is the preferred kit for “max effort” tuned GTRs using the stock ECU. Unlike the 3 port solenoid that only adds pressure to the top port of the wastegate and leaves the bottom port connected to a boost pressure source, the 4 port solenoid will reduce pressure at the bottom port while simultaneously adding pressure to the top port, effectively increasing your spring pressure and maximum boost level possible even with high exhaust manifold back pressures. With the added ef