Exhaust size

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Apr 20, 2008 | 08:51 PM

JIFF97

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Joined: Mar 2008

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From: P.A.

Exhaust size

This may seem like a dumb question.... y is it that the stock exhaust size on my truck is 2.5, but after the muffler it jumps up to i think 3". does exhaust size not matter after the muffler?

Apr 20, 2008 | 10:22 PM

joshmac4.6

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From: Western NC

It should be the same all the way if it's stock. But the sizing matters throughout, it helps to keep velocity high, and reduce backpressure.

Apr 20, 2008 | 10:39 PM

JIFF97

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From: P.A.

it was stock(before i pulled the muffler off) but clearly the pipe comeng out of the muffler was bigger then the pipe from the cats to the muffler.

Apr 21, 2008 | 08:40 AM

DarrenWS6

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Joined: Mar 2008

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From: Mansfield, P.A.

I measured my '04s tailpipe & it looked like it was 2.75", so your not the only one that noticed this. I think its just to quiet it more, Ford loves making them quiet..

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