Whats the difference between test pipes and HFC

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06-19-2011, 12:12 AM

G3V

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Whats the difference between test pipes and HFC

Im not sure if my megan pipes are test pipes or if they are high flow cats. is there a specific way to tell them apart?

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06-19-2011, 01:03 AM

Tollboothwilley

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yes, test pipes are hollow HFC have catalytic materials inside that look like honeycomb.

Megan doesn't make HFC for the G35

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06-19-2011, 03:20 AM

irishsig

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^what he said.
HFCs have a bulge for the internals, TPs are basically just a straight pipe with no bulge.
TPs are just a connecting pipe from the headers to the rest of the exhaust.

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06-19-2011, 09:34 AM

KBTOPDOG

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Dont' forget resonated test pipes vs. non resonated

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