If your cat is on the manifold and you replace it with a header you will either need to add one after the header or run it without one.

 

i called them on a thursday evening. and the exhasut arrived on tuesday. they are out of michingan and im in illinois so it wasnt that far of a trip. somewhere else might take a day or 2 extra but it was a good deal. at first when i called i was a little worried cause it souned strange. but they had great ebay feedback so i wnt with it. if you want the kit i really suggest callling them. you wont be dissappointed

 

here the link so u can hear the magnaflow !!! anyways get urs off ebay cause right now they have some good deals ! like cat back with free shipping and free catalitic converter !! sorry i cant spell that ! hehe but there going for $344 for my 99 si !! anyways check the link out for the sounds >>> http://www.magnaflow.com/04sound/import.htm

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