Greddy Profec Type-S Boost Controller (Black) - P/N: 15500211 Product Model: GRD-15500211 As easy to use as a manual boost controller, but with advanced electronic boost controller response, the PRofec Type-S keeps things simple. Two rotary switches select two independent boost setting (Lo. and a Hi.), while third, GAIN switch adjusts the wastegate’s valve response. Matched with a large capacity inline control solenoid, the Type-S works with both integral and external wastegate set-ups. It is also still compatible with Greddy's RSS or SCC.