SIP Viper / Nordspeed box exhaust


since reading about this new exhaust in the ScooterLabUK article, I would like to know more about the power characteristics and when it will be available. I am building an MHR 210 with 60mm stroke, reed valve and Keihin PWK35. The transfer timing will be 126-129, and the exhaust timing 183-186.


Any update on when this will be available