Subaru WRX Manual Boost Controls

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	Perrin Performance Manual Boost Controller Subaru WRX/STI 02-14  Model Number: ASM-INT-700   View Price The PERRIN manual boost controller is a simple inline device that allows the customer to adjust boost simply by shortening or lengthening the Boost controller body. Some boost controllers use a simple adjustable bleeder (similar to a jet on a carb, if you can remember that far back) and while this can control boost, these generally provide a falling boost curve. These systems cant adjust for more volume of air as the turbo starts to push more air. Some boost controllers use a ball and spring ...