Im thinking about purchasing a ITR header on my 2000 LS. Will the OEM ITR HEADER bolt onto the LS engine? please help

 

yes, the true question is will it give u any gains.

 

Yes, there are small gains to be had from using the USDM ITR exhaust manifold on an LS .. I know the shape of the manifold as well as the way the collector joins the 4 runners makes a difference over the LS part .. I have a diagram that shows the difference .. I'll see if I can find it .. All in all, if you can get the ITR manifold for cheap, then go for it..

 

my car felt stronger when it had the stock ITR header then when i had my DC 4-2-1 header.