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  • October 22, 2018, 01:36:55 AM

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Author Topic: Late model 4.0 exhaust  (Read 73 times)

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Offline Zoro

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Late model 4.0 exhaust
« on: September 29, 2018, 02:16:36 AM »
I've got a 4.0 from a 2003 Wrangler I'll be swapping into my Eagle and I'm trying to figure out the exhaust. I see there is a gorgeous header out there for the 4.0 head in the Eagle BUT I believe it's designed to have the CAT after the header. On the model of 4.0 I'm using there are 2 CATs that each collect from 3 cylinders before the Y pipe.


Is there a header out there that would accommodate my setup? My goal is to have the 4.0 running in the car as if it were stock and emission legal.
84 Eagle Wagon aka 'Zoro II'
263,000 miles and counting!

Offline vangremlin

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Re: Late model 4.0 exhaust
« Reply #1 on: September 30, 2018, 08:07:59 AM »
I have a"header" style exhaust manifold that is hooked up to my 4.0 head, came out of a mid 90s Jeep, and the cat is farther back in the exhaust train.  Not sure what came in the 2003 Jeep but adding the cats in before the "Y" sure would make things crowded in there lol.  Hope what you're looking for exists.
1981 Kammback 258 - "Pepe"
1980 Coupe 258 - "Ginger
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390 - sold

Offline Zoro

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Re: Late model 4.0 exhaust
« Reply #2 on: September 30, 2018, 11:35:15 AM »
The 2003 is weird, has 3 cats. 3 cylinders per cat on the first 2 then one farther back
84 Eagle Wagon aka 'Zoro II'
263,000 miles and counting!