downpipe size

sleeps · Apr 22, 2013

I'm running a 4" downpipe right now with the stock turbo. Going non vgt as soon as my kit shops. At what size turbo does the downpipe and/or flange need to be changed? I'd hate to tear everything apart to find that the downpipe doesn't fit the new turbo.

Mdub707 · Apr 22, 2013

Most of the stuff you'll be buying will work fine with what you have. What size turbo are you thinking? You sure you even have the 4" DP, they're kind of a PITA to get in there, most are advertised as such, but in reality are still 3.5" DP's.

sleeps · Apr 22, 2013

Mdub707 said:
Most of the stuff you'll be buying will work fine with what you have. What size turbo are you thinking? You sure you even have the 4" DP, they're kind of a PITA to get in there, most are advertised as such, but in reality are still 3.5" DP's.

It very well may be a 3.5" but it said 4". I'm going to start with the 66 I already ordered. Then move to a 72 after I work out all the bugs and upgrade everything else.

HOOV3R · Apr 22, 2013

sleeps said:
It very well may be a 3.5" but it said 4". I'm going to start with the 66 I already ordered. Then move to a 72 after I work out all the bugs and upgrade everything else.

66 should fit fine. You may need a custom exhaust housing depending on what 72 you go with.