Thread: T28/T25 Downpipe Question..

AND IF ANY OF YOU ARE USING A S13 T25 LIKE I HAVE IN THE PAST AND I AM AGAIN CURRENTLY THE GTi-R O2 HOUSING IS THE ONE YOU WANNA USE, ITS A DIRECT FIT WITH NO MISALIGNMENT.

I don't see why this is such a goddamn difficult subject. The downpipe goes with the o2 housing. If you have a T25 downpipe and a T25 o2 housing, then you can use that combination with either a bluebird manifold, or a gti-r manifold, and either a t25 or t28 turbo. If you have a T28 downpipe, and a T28 o2 housing, then you can do the same thing. I've done it and it works fine. If you want to use t28 turbos with t25 j-pipes, you have to ream out the holes slightly. It takes 5 minutes, i hardly even consider it a modification.

So basically, use matching downpipes and 02 housings and you will be fine. End thread.

There is basically only 2 issues at hand in this whole entire thread and here they are:

Like daveracer just said:

#1 Match the downpipe with the o2 housing.

#2 Match the o2 hosuing with the turbine housing you plan to use if you dont wanna have to do any modification (i.e. cross-slotting 1 hole a few millimeter).

I listed above what turbos are a perfect match to which o2 housings, its in BLACK and WHITE, i even threw in a BOUNUS about the S13 T25.

x2 closed thread

So I have GTI-R manifold, with T28.. but I think I have a T25 DP.. which J-pipe should I use?
I think the search button hates me by now. :nevreness:

If its a t25 dp you should use a t25 jpipe.

Yup T25 Jpipe, plus they are easier to obtain, but will sit lower then the xmember so keep that in mind!

I wish I knew before hand, I can't get the o2 to fit now. I'll have to plug up J-pipe, and weld two bungs on DP.
It wasn't this hard with the T25

to fit a T25 jpipe to a T28 turbo, all you had to do was widen one hole.