Noob question

[Zeph240sx]

So im about to bolt on my S15 BB turbo to my S13 Red Top in a 180sx.

Which Intercooler should i get?

Isis S13 intercooler or
Isis S14 Intercooler??

Because since all SR is the same except for turbo should i get the S14 Intercooler? Sinc eim using a T28 Style Turbo
I don't wanna buy the wrong fitment product

[waxdnuggz]

You buy s13 if you have an s13

[AZhitman]

^ What he said.

The only difference is the way it attaches to the car, so get the IC that matches the car, not the engine.

Realistically, you'd probably be fine with a universal IC and mount it wherever you want.

[blkvrtswp]

It's the intake side cold pipe to TB that is a PITA if you have the wrong FMIC for the engine. Hot pipe side is much easier to modify for the turbo outlet angle.

I have mounted S14 FMIC on S13 chassis and vice versa - the L-shaped brackets need only tiny modifications. MUCH easier that having to modify the cold pipe.

So bottom line from a guy who installed 80+ SR's - Match the FMIC to the engine not the car.

EDIT: And in the OP's case, use an S13 FMIC kit and modify the cold pipe.

[Zeph240sx]

thats what i thought too Blkvrtswp, Because the bodys the same, its the engine and the turbo outlet is different. I have a redtop on a GT28R
and since im using GT25R its a different turbo outlet port then let say a T25. Now if i get a S14 version it might not fit with TB like you said but fits the S15 Turbo.
Im lost.

[blkvrtswp]

Many times we just took a cheap s13 aluminum hot pipe (or 2), cut it in 1 or 2 locations, rotate the pieces, perhaps take out a pie-shaped section, and add silicone coupler(s) and clamps. This should work for most non-OEM turbos with some creativity and trial-and-error.

My FP 20G - outlet angle very similar to S15/S14:


S13 alum hot pipe cut & rotated w/ extra coupler:


Another angle:


Stock S13 hot pipe connection to FMIC:


Good luck!