Exhaust size
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Senior User
Joined: Oct 2002
Posts: 205
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From: Connecticut
Exhaust size
im curious im going to be putting on a custom cat back exhaust system. whats the exit side of the cats pipe size? what is it before the cat? i also plan on a high flow cat i just need to know the specs so i can buy the right parts thanks
Senior User
Joined: May 2000
Posts: 137
Likes: 0
From: conneaut usa
Exhaust size
best advise is to emaure it may differ a bit at the dealer where I work I just installed a cat-back exhaust at 2 1/4 stock so thats worth just getting under and measureing it out it was a 93 F-150 with a 300 in it
Godbless quads
Godbless quads
Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
Exhaust size
im almost positive its 2" from the manifold to 1st cant then 3" into the 2nd and the opening at the 2nd is 3" then it runs into 2 1/4" to the tail pipe which some were flared to 2.5".
Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
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Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
Exhaust size
stock is 2.25" on a 300 and my exhuast guy said i would need a piece to make it down to 2.5"....dunno maybe ill go measure my dads and see...
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Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
Exhaust size
On my truck it was 2" into the first cat, then a piece of mangled looking POS 3" pipe to the second cat. The exit of the second cat was 2.5" for about 3/4", then necked down to 2.25". Now it's got headers and 3" all the way out.
