Quote Originally Posted by Don Supreme View Post
4" inlet and anti-surge huh? 4" seems a little large for a 3071, also are these turbos prone to surging?

Is ATP providing a down pipe?
My reason for going with the 4" is I might try one of the ATP 3.5" MAF housings down the road. I think the 3.5" MAF and 550's would be as close of a match as possible to 2.75" and 440's ratio. I think it may run better that way rather than a VR6 housing and 550's with lemmi tweaks. Just one of the things I thought about. So because of that I ruled out the 3" inlet. When I ordered everything yesterday, they highly recommended the anti surge housing with the 4" inlet on a smaller 4 cyl. He said it would be fine without it but he would recommend I do it. For a small extra charge figured why not, what could it hurt?

Yes I got a 3" ATP Vband Downpipe