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What size test pipe?

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Old 07-29-2010, 06:38 PM
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Default What size test pipe?

How do i determine what size test pipe to go with? I already have a magnaflow exhaust which i think is 2.5" pipe. Would i benefit going with a 70mm or 63mm? I also want it to have the cel fix. Any opinions?
Old 07-29-2010, 06:55 PM
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3"

Or if you want a good cheap one, 70mm Invidia.
Old 07-29-2010, 09:21 PM
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Originally Posted by Crackerballer,Jul 29 2010, 06:55 PM
3"

Or if you want a good cheap one, 70mm Invidia.
There's no point in him getting a 3" testpipe if his catback is only 2.5". Just a 63mm and you'll be good to go.
Old 07-30-2010, 10:01 AM
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would it make much difference running a 63MM testpipe > 70MM exhaust vs a 70MM testpipe > 70mm exhaust with the stock header?

Old 07-30-2010, 11:13 AM
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If you are going to stay with the 2.5" cat-back you have now, going with a 70mm test pipe is just going to bottle neck and cause turbulence in the exhaust flow. Go with the 63mm.
Old 07-30-2010, 04:27 PM
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doesnt make a diff in my opinion. 63mm is fine
Old 07-30-2010, 05:34 PM
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Let me rephrase, 3" test pipe and get a 3" catback.
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