GrimmSpeed Universal Manual Boost Controller, Universal The GrimmSpeed Universal Manual Boost Controller is an inline bleed-style controller that raises boost by restricting the wastegate actuator signal. Adjust the knob, lock the setting, no wiring, no ECU required. DETAILS Knob-adjustable inline restriction Works with any pneumatic wastegate actuator Locknut secures boost setting Fits standard 3/16" boost line Fitment: Universal Manual boost controllers bleed off boost signal before it reaches the wastegate actuator, causing the actuator to hold the wastegate closed longer and build more boost. The GrimmSpeed unit uses a needle valve for precise, repeatable adjustment that holds its setting without drift. Install inline in the boost signal line between the compressor housing tap and the wastegate actuator. Adjust until the desired boost level is reached, lock the adjuster. No electronics, no datalog required. What's in the Box GrimmSpeed manual boost controller Fittings and hardware Why Choose GrimmSpeed GrimmSpeed has been engineering performance parts for Subaru platforms from their Portland, Oregon facility since 2003. Everything they make is designed around real-world use, their engineers drive the same cars their customers drive, which means product decisions are made with genuine platform knowledge behind them. GrimmSpeed designs parts in-house, sources quality materials, and validates fitment on the actual application before release. The result is parts that install correctly the first time, perform as advertised, and hold up under the conditions Subaru owners actually subject their cars to. Whether it is a critical engine component or a cosmetic upgrade, the same attention to detail and fit quality applies across the catalog. The RallySport Take The GrimmSpeed manual boost controller is the straightforward solution for raising boost on any turbocharged car with a pneumatic wastegate. One function, done reliably. Universal turbo fitment. Fitment Year Make Model Notes Universal , ,
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