because the catback does not do anything for performance. there are plenty of guys making 350+ whp on a stock catback.
a 3" catback just makes it loud and wastes money. now a 3" downpipe, that is needed. anything past that is just fine at 2.5".
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04-21-2009
because the catback does not do anything for performance. there are plenty of guys making 350+ whp on a stock catback.
a 3" catback just makes it loud and wastes money. now a 3" downpipe, that is needed. anything past that is just fine at 2.5".
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