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What is the difference between HFC and test pipe?

Originally Posted by m4a1mustang There is NO performance difference between 12" or 18" resonators. The resonators only affect sound volume. thats what i said 12" = loudest +tp = best

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What is the difference between HFC and test pipe? What is the difference between HFC and test pipe?
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Old 07-06-2010, 03:54 PM   #31 (permalink)
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Originally Posted by m4a1mustang View Post
There is NO performance difference between 12" or 18" resonators. The resonators only affect sound volume.
thats what i said 12" = loudest +tp = best gains. i was looking at the dyno sheets and test pipes have a few more hp compared to the sheet with hfc's
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Old 07-06-2010, 04:30 PM   #32 (permalink)
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thats what i said 12" = loudest +tp = best gains. i was looking at the dyno sheets and test pipes have a few more hp compared to the sheet with hfc's
non resonated would be louder then 12", if thats what you meant.
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Old 07-06-2010, 06:45 PM   #33 (permalink)
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non resonated would be louder then 12", if thats what you meant.
12" are louder than 18" right? non resonated u talking about the tp's?

and sorry if my english is not perfect i went to french school... excusez moi pour mon anglais
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Old 07-06-2010, 07:07 PM   #34 (permalink)
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12" are louder than 18" right? non resonated u talking about the tp's?

and sorry if my english is not perfect i went to french school... excusez moi pour mon anglais


yes 12" are louder then 18" but you can also go no resonators on the exhaust. Test pipes comes in resonated or non-resonated.
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Old 07-06-2010, 08:35 PM   #35 (permalink)
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i was looking at the dyno sheets and test pipes have a few more hp compared to the sheet with hfc's
True..Test Pipes do produce more HP than HFC's bu not by much...and you will only see the gains at the top end
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Old 07-06-2010, 09:23 PM   #36 (permalink)
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i have the MXP Resonated Test Pipes with MXP CBE... i love my setup! you could search youtube for my dyno video if you're really curious on the sound.

it's raspy, but kinda in a good way... once cruising in 6th gea,r the in-cabin sound is surprisingly quiet!
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Old 07-06-2010, 09:44 PM   #37 (permalink)
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i have the MXP Resonated Test Pipes with MXP CBE... i love my setup! you could search youtube for my dyno video if you're really curious on the sound.

it's raspy, but kinda in a good way... once cruising in 6th gea,r the in-cabin sound is surprisingly quiet!
awww sh*t thats ur z lol nice man i was looking at the drop looking real good and sounds real nice man not too raspy
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Old 07-06-2010, 09:49 PM   #38 (permalink)
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yes 12" are louder then 18" but you can also go no resonators on the exhaust. Test pipes comes in resonated or non-resonated.
so no resonaters on the exhaust + test pipes will it be too raspy with FI? i just want the best gains + loud deep tone, not too raspy ... man im asking for too much i think
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