Yamaha 61X exhaust reducer sleeve for a stock exhaust on a Yamaha SuperJet, WB1, or any twin cylinder Yamaha engine running a 61x OEM exhaust.
Reduces the exhaust outlet size creating more trapping pressure in the chamber resulting in more power & throttle response.
This sleeve is a MUST for a lites racing class setup SuperJet, and is great installed on a recreational ski where you want to keep the stock exhaust. This will help "wake up" the stock exhaust with giving it more over-rev.
We have done a lot of testing, and we can guarantee that this sleeve will pull more RPM than the other brands on the market.
Includes SS hose clamp.
To work in hand with the exhaust sleeve to "wake up" the stock exhaust, we also have our water restricting kit here.
Part Number: HSI-75-0008
