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WRX Turbo & Boost Control

(79 products)

The boost side of the turbo system: electronic boost control solenoids, blow-off and bypass valves, wastegate parts, turbo hoses and heat shields for the WRX and STI.
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A 3-port boost control solenoid gives a tuner tighter control than the stock 2-port unit, but the tune has to be adjusted for it. A stronger bypass valve or blow-off valve holds boost better on a tuned car. A vent-to-atmosphere blow-off valve can upset the idle on MAF-based cars unless the tune accounts for it, so check before you buy one.

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