The 2015+ Subaru STI GrimmSpeed Manual Boost Controller utilizes over 250 adjustment points that lock in place using a heavy duty stainless dual ball detent system. An extra long travel spring gives you superior range between 0-60 psi, unmatched by any other manual boost controller. CNC machined from weapons grade 6061 aluminum. When making boost adjustments, theres no more guesswork with this controller as it gives you active feedback by clicking for each turn. The scale is laser etched for an easy to read scale.
- 2015+ Subaru STI GrimmSpeed Manual Boost Controller
- Increase or decrease boost when you want to
- Long travel stainless steel spring for maximum range
- Psi range: 0-60
- CNC machined 6061 anodized aluminum
- Laser etched scale