Issues with Cat install

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Dec 16, 2006 | 06:43 PM

grizz3000

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From: SE of Bennett Colorado

Issues with Cat install

89 F250, 460/7.5, 4x4, C6 Auto

Okay, I need to put on my high flow Cat. The stock exhaust and stock Cat connect via a 4-bot housing. Two pipes come from the manifolds (replacing with headers during this project) and my new Cat has ONE 2.5" intake and exit.

Suggestions how to connect the one-in/one-out new Cat? A Y pipe?
I am only finding Y pipes for the 7.3 engine though.

Last edited by grizz3000; Dec 16, 2006 at 07:02 PM.

Dec 17, 2006 | 01:03 AM

preppypyro

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From: North Central Rural Sask.

What about getting another cat and running dual exhaust?

Dec 17, 2006 | 01:05 AM

grizz3000

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From: SE of Bennett Colorado

Yeah, was a thought. But I'd have to return this Cat, wait for the 'credit', and shop for a new cat. Oh, and I already have a Cat-back exhaust waiting in the garage to install that expects a single-out of the Cat.

I'd use the old cat but it broke off between the cat and the muffler, leaving little of pipe to use.

Last edited by grizz3000; Dec 17, 2006 at 01:15 AM.

Dec 17, 2006 | 01:14 AM

preppypyro

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From: North Central Rural Sask.

Well I guess you could always get some exhaust pipe and fabricate something up to use.

Dec 17, 2006 | 11:44 PM

gring

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grizz, did you solve your problem ?

Dec 17, 2006 | 11:47 PM

grizz3000

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From: SE of Bennett Colorado

I ordered a new Cat that has the 4-bolt flange. I should be okay once that arrives.

Since my new headers will 'exit' lower than the stock manifolds, I'm still unsure how the new headers will fit the stock pipes to the cat flange.

Standby for news. I gotta do the oil pan and rear seal before I really worry about the exhaust. I guess you could say I'm getting all my ducks in a row first.

Dec 18, 2006 | 12:07 AM

gring

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Last week I had a Y custom made by my mechanic on my Saab. He bent two pipes starting from the manifolds, joined them after cutting and buffing (much buffing). The joined pipes made an oval of about 3 inches by 2. He extended an end of a 2 pipe to about 3 inches, flattened it and soldered it to the joined pipes. Then he joined the flexible hose and another pipe to hold the O2 sensor and solderd that to the cat. It toook 4 hours to bend, solde and fit all that. When you say you replace the two pipes from the manifold with headers, what do you mean ? Does the headers replace the manifolds and pipes ?