Modified XJ Cherokee Tech XJ (84-01)
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Old Dec 11, 2012 | 04:51 AM
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Anyone running duals? Maybe,a 2 outlet muffler? Need some info
Old Dec 11, 2012 | 05:51 AM
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Nah. Freeflowing muffler and eliminate the "crush" in the headpipe.
Old Dec 11, 2012 | 06:37 AM
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Yep some guys are. IMO it's tight enough back there (twss) unless you run a turndown before the rear axle, which may be illegal/unsafe. There's not much point unless you fix upstream issues like cruiser54 alluded. Mandrel-bent 2.5" pipe, high flow cat, high flow muffler are all the 4.0 really needs. Most people just do cat-back which takes care of only part of the problem.
Old Dec 11, 2012 | 06:47 AM
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Originally Posted by salad
Yep some guys are. IMO it's tight enough back there (twss) unless you run a turndown before the rear axle, which may be illegal/unsafe. There's not much point unless you fix upstream issues like cruiser54 alluded. Mandrel-bent 2.5" pipe, high flow cat, high flow muffler are all the 4.0 really needs. Most people just do cat-back which takes care of only part of the problem.
2 things come to mind.

One, as you mention, is routing.
Two, is the sound. I've never heard a straight six with duals that I liked listening to.
Old Dec 11, 2012 | 06:26 PM
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Its got an aftermarket header on it, had it when i bought it, the cat has been removed and replaced by a straight piece of pipe, only the stock muffler is on it, sounds pretty deep im guessing because of the header, i was just thinking a 2 outlet muffler folliwed by 2 90 degree tips behind the back wheels.
Old Dec 11, 2012 | 07:48 PM
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You might want to put that cat back in if you want to be compliant with federal law. Many people think that a lack of local emissions tests means that it's not illegal. The rumble will be more from the straight pipe then. Unless you really are doing it for the looks get the high-flow cat and a real muffler with 2.5" pipe. The stock is crap.

Originally Posted by cruiser54
I've never heard a straight six with duals that I liked listening to.
That's awfully broad. A 6-71 Detroit with duals - or anything really - is a thing of beauty.
Old Dec 11, 2012 | 07:52 PM
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Originally Posted by salad
You might want to put that cat back in if you want to be compliant with federal law. Many people think that a lack of local emissions tests means that it's not illegal. The rumble will be more from the straight pipe then. Unless you really are doing it for the looks get the high-flow cat and a real muffler with 2.5" pipe. The stock is crap.

That's awfully broad. A 6-71 Detroit with duals - or anything really - is a thing of beauty.
Been stopped plenty of time for being loud with just a header, they just say i need to get it fixed, never even gotten a warning. But i appreciate your concern
Old Dec 11, 2012 | 08:26 PM
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Being told to get it fixed was the warning
Old Dec 12, 2012 | 04:48 AM
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I meant a paper warning, and i really dont care.
Old Dec 12, 2012 | 08:48 AM
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Don't be surprised if this thread gets locked then.

https://www.cherokeeforum.com/f70/an...rum-com-rules/

https://www.cherokeeforum.com/f2/cat...er-laws-24337/
Old Dec 12, 2012 | 09:37 AM
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This is the first automotive forum thread I've EVER seen someone get ***** for not wanting to run a cat. LOL
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