Y pipe

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Apr 8, 2006 | 12:53 AM

blackop

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Y pipe

I have a `97 expedition 4x4 with the 5.4 engine. I have added gibson headers and 3 inch cat-back exhaust. Would I see any benefit from increasing the y pipe size?

Apr 8, 2006 | 06:39 AM

KubotaOrange76

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From: GA

you would proabbly see a very small improvement....but it wouldnt hurt

Apr 8, 2006 | 05:12 PM

kens64

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From: Rio Rancho USA

Considering thats one of the biggest restrictions due to how they are made at the factory, yes. Replacing everything but the Y pipe is like keeping a cork in an otherwise good flowing system.

Apr 9, 2006 | 03:49 PM

pronstar

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This is similar to what my factory y-pipe looked like.
Choked down to 1.6 inch inside diameter.

[img]images/1662-2504-73029.jpg[/img]

Apr 10, 2006 | 07:27 AM

cleatus12r

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Joined: Apr 2004

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From: Reed Point, MT

The most a system will ever flow is dictated by the smallest diameter. It's the same principal as the "chain is only as strong as it's weakest link" adage.

Cody