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changing downpipe

Posted: Sat Aug 23, 2008 1:05 pm
by avipolo16v
i've already change my cat to magnaflow highflow cat and a supersprint exhaust

i want to replace the pipe between the manifold to the cat and the pipe between the cat to the exhaust to pipe with bigger diamter (from 1.75" to 2.5")

i know that a to big pipe will make the gas emmosion to slow

this is worth a try? someone here make this change?