C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

cat removal?

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Old Mar 29, 2009 | 08:03 PM
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Default cat removal?

I have a friend with a 93 c4 that wants to remove his cat's, will it need to be reprogrammed? thank's!
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Old Mar 29, 2009 | 08:41 PM
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Shouldn't, but probably just as well to replace the old ones with new high flow cats, especially if they are the originals.
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Old Mar 29, 2009 | 09:22 PM
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If he wants to go completly catless, he should replace the empty shells with test pipe. The empty shells will cause turbulence which will defeat the purpose of deleting the cats to gain horsepower. If he wants to go high flow, get a reputable brand like catco, random tech, magnaflow ect. Not some no name cheap thing. The good high flow cats filter better and do not restrict anywhere near as much as the original cats especially if they are clogged.
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Old Mar 29, 2009 | 09:31 PM
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No reprogramming required.
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