Header Question
 

If I want to use a header made for a 94-99 GSR on an LS would I have to:
A. Get a GSR length cat (If I do this will everything bolt up to the LS B-pipe?)

or

B. Get a highflow cat (ie. Carsound). If I do this will I have to get a longer or shorter length (I sure longer but I just want a confirmation on this) cat and will this bolt on to the LS B-pipe without any problems?
Thanks
http://rely.net/~htimages/smile/emsmile.gif