Anyone ever use 4" downpipe?

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Jun 26, 2013 | 01:05 PM

#26

Terminator2

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Joined: 07-25-08

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From: Florida

Quote:

Originally Posted by breds2k

Changing the subject here a bit....I knew a guy that had a 2.5" header back exhaust on a 3.0V6 with about 200hp, then he downsized from the resonator back splitting to 2 2" pipes with no rear mufflers, said it helped back pressure.

Any truth there?

A single 2.5" to a dual 2" or a dual 2.5" to a dual 2"?

Jun 26, 2013 | 01:33 PM

#27

Staged07SS

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From: NEPA

Quote:

Originally Posted by Terminator2

A single 2.5" to a dual 2" or a dual 2.5" to a dual 2"?

This.

Need some more details on the setup breds2k.

Jun 26, 2013 | 02:40 PM

#28

m33pm33p

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Joined: 12-19-10

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From: Coquitlam

a 4" cut out will do nothing for your car on a k04, if anything it will cause a massage airflow disruption and skew all sorts of things.

for a 4" cutout to be worth anything you need more power than zzp's cars are putting down.