my friend has a 97 gsr andis looking to buy a header with a 2.5' collector, when he goes to bolt it up is he going to have any problems with fitment on his stock exhaust??

 

i think the 2.5'' collector wont match up with the stock exhaust, i may be wrong, but if thats the case make sure he gets a gsr not ls cuz the gsr header is shorter, i say this cuz others say if its b-seires its the same and bolts up but on gsr the b- pipe is diff. but just make sure he gets a gsr header and if someone else knows if it will bolt up to his stock exhaust?

 

A few companies make 2.5" collector headers but think about this. If you need a 2.5" collector you better have a 2.5" high flow cat and a 2.5" cat back exhaust. The stock cat is made for a 2.25" collector and the stock cat back is 1.91", many aftermarket cat backs are 50-60mm. In short, if you really need a 2.5" cat back the motor it would be going on would be extremely healthy and making a serious amount of power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by idrivesideways &raquo;</TD></TR><TR><TD CLASS="quote">A few companies make 2.5" collector headers but think about this. If you need a 2.5" collector you better have a 2.5" high flow cat and a 2.5" cat back exhaust. The stock cat is made for a 2.25" collector and the stock cat back is 1.91", many aftermarket cat backs are 50-60mm. In short, if you really need a 2.5" cat back the motor it would be going on would be extremely healthy and making a serious amount of power. </TD></TR></TABLE>

Both true, i went w/ a 2.5" high flow magnaflow cat w/ a kteller 2.5" inner diameter cat back weld up pipe kit w/ a magnaflow muffler.

 

so he'll need a 2.25 inch collector?? anyone know a good header with a 2.25 collector??

 

Get a cat to match the size of the header collector, whether its a 2.25" or 2.5".