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Since cats seldom go bad on Corvettes (under 150,000 miles), be sure they are truly at fault for diminished performance. "Universal fit" cats aren't the best replacements for your Corvette.
96 lt1 a/4, my cats are clogged. some say random tech best bet takin all advise on which cats. thanks 13.02 @ 106 mph mods cold air & hypertech III
RT does have some of the best cats on the market, but you pay for them. If your car has the stock manifolds and exhaust system they really aren't worth the extra money. If you plan on putting on a set of LT headers though, that's a completely different story.
13.02 @ 106 mph mods cold air & hypertech III 
