Originally Posted by MarshyTheKid
I wouldn't think the two headers would be interchangable since you have to buy a header for ITR and a different one for LS.
The GSR is the one with the different length header, cat, and B-pipe. ITR and LS exhaust components are interchangeable. If you look for a Comptech header, the ITR and LS part #'s are the same.
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