S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

Quick question???

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Old 06-19-2008, 10:03 AM
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Default Quick question???

Would i have to update my GIAC software, since i gutted the pre and main cats????? I know APR has a more agressive tune for when you upgrade your DP's??? just wondering and thanks in advance
Old 06-19-2008, 11:32 AM
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The only thing gutting should affect is a possible faster spool, but the question is how much faster
Old 06-19-2008, 12:51 PM
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quick answer....no.
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