Got a used USDM DC 4-1 for sale off my ITR... was wondering if it was a direct bolt on for LS... or pretty much the header will only bolt on for ITRs.

 

ANy B series header will bolt onto a B series engine. The exhaust ports are the same.


It is just the fitment to the chasis. I.E. A b-series in a hatch will have to modify something to get it to fit.....header or cat-back.

 

so all the Bseries headers will be a direct bolt on to the stock CAT... be it on an LS/GSR/ITR?

 

See that is the thing, what stock cat? The ITR's or the LS's?

Are you trying to get a ITR header on an LS with the LS cat&cat-back? (Might have fitting issues)

Or are you pulling the entire ITR exhaust and putting it onto the LS (Yes)

 

They are both the exact same on each end.... My friend has a GSR hatch that had a 4-1 DC header on it for a GSR. It cracked so we put a stock LS header on it and had to have the cat modified. Then i gave him my US ITR header and it bolted right up, so you should have any problems.

 

so the ITR header bolt directly onto an LS with a stock LS without any modifications to the cat (shortening/lengthening)?

 

ITR, LS and 00-01 GSR header and exhaust are interchangable