Improves supercharger reliability and performance by relieving unwanted pressure during off-throttle operation. Reduces supercharger clutch & gear wear and eliminates heat soak in discharge tube. The body and all internal components are CNC-machined from 6061 aluminum alloy. Features a large 50mm va...

Enables you to run a blow off valve with the stock intercooler, to relieve excess pressure on the supercharger wheel in off-throttle situations NOTE: The Turbosmart 50mm is compatible with the stock air box in place....

HKS Super SQV (Sequential Blow Off Valve) uses a unique sequential valve structure and a differential pressure control system, which allows for a broad operating range from low boost to high boost. Its Pull-Type relief design ensures stable operation regardless of the amount of boost pressure. The S...

This block-off kit is used to cover the opening when recommended TiAL Blow-Off Valve Kit is not utilized on RIVA Yamaha Power Cooler or removed from Sea-Doo Intercooler Tubing Upgrade Kits....

This block-off plate is used to cover the opening on RIVA Yamaha Power Coolers when recommended RIVA/HKS Blow-Off Valve Kit is not utilized. Does not include Blow-off Valve C-Clip Kit (part# RY17040-CK)....

For use with RS17080-ICUK & RS1751-PC Kits when you choose not to run a blow off valve on your ski....

Stainless steel C-Clip & o-ring for securing HKS SSQV Blow-off Valves or Block-off Plates onto SSQV type mounting flanges. NOTE: Included with RIVA Power Cooler Kits for Yamaha SVHO (RY17040-PC-1) & SVHO (RY17080-PC) engine models....