Thread: How would switching from HFC's to resonated test pipes change the sound?
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Old 01-31-2011, 10:08 AM   #5 (permalink)
Dembflyr
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Originally Posted by cdoxp800 View Post
If your going to go SC you will want to keep the HCF. The reason for this is, if the exhaust it too free flowing you will lose Boost pressure with a Supercharger setup. I when was using Berk HFc's switched back to stock cats and gained 2.5 PSI and 30Whp/Tq.
I have been told that HFC's will melt due to the higher temps generated by going FI.
From what I understand, GTM is working on cracking the VVEL so there shouldn't be an issue with test pipes.
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Last edited by Dembflyr; 01-31-2011 at 10:11 AM.
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