i am looking for some mid 13 sec passes out of my 91 Z i got it running a best of 14.15 all stock with a borla cat back. The borla didnt help me at all and i have been told that some high flow cats should pick me up i am just begging to get into the 13's. Any advise on if the cats will work and what brand to use would help. Plus if anyone has anymore suggestions on how to acheive my goal it would really help.

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91 Z-28 L-98 Black stock 14.20 @ 97

 

Bad Blk Z, I am going to move this to the Exhaust Forum. I think you may get a better response there.