or contact them,twin pipes are a bitch to dial in and hope your good at tuning because all these numbers dont mean anything because every sled is a little different,best to start way rich and lean down from there with plug reading and piston wash:d
Sorry I don't mean to hijack your thread but if someone has numbers for an 07 m8 full speedwerx exaust, slp intake, vforce reeds and mild porting, could you send me a p'm, thanks