that's ture but the longer runners give less turbulance in a header. WHen hitting higher RPM makes alot of difference to the power & spooling, that's why all high power applications generally use longer runners, but you got it right about boost control , you want the wastegate to be on most of the runners to release faster.

Quote Originally Posted by A-man View Post
yeh but member to get the wastegate in the middle of the 4 runners not off on one because u will have more control of boost with the gate on 4 runners not on 1

the cast iron ones dont look that good but they seem to be the way to go