I just got in the corvette fever for july, and they are talking about 60hp using bolt-on parts. I was going to purchase Tpi specialies long tube headers and random technology cats, but my thing is I already have Corsa X-pipe installed and Indy mufflers. Both are 2 3/4in, but it seems the headers and cats are 3" and the converters come w/ X-pipe which i dont need. Do the headers come w/ 2 3/4" collectors, same w/ the converters? Also does anyone know if the cats can be ordered without the X-pipe. :confused
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