The 2015+ Subaru STI PERRIN Manual Boost Controller is a simple inline device that allows the you to adjust boost simply by shortening or lengthening the Boost controller body. The “twist-to-adjust” body incorporates a custom wound internal progressive rate spring and ceramic metering ball for boost management. The Ball and Spring portion of our Boost controller holds boost pressure from getting to the wastegate actuator. This makes for a very responsive turbo. As the pressure exceeds the set point, the ball lifts and lets pressure to the wastegate actuator.
- 2015+ Subaru STI PERRIN Manual Boost Controller
- Increase or decrease boost when you want to
- Easy to adjust boost pressure
- Long travel stainless steel spring for maximum range
- CNC machined 6061 anodized aluminum
- 5 year warranty