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I drive a '93 YJ with a near death 2.5L as a daily driver. Currently my exhaust is routed so that is exits in the factory location (rear passenger side) with the pipe going sraight out with no down turn. After every driving session to class, home, etc, I tend to smell like like burnt oil. Until I swap in the new motor, I was wondering if there was anywhere I could cut the exhaust off or re-route it to where the exhaust does not want to come back into the vehicle from the rear backdraft. Any opinions? And no, I do not care to go with a semi's routing out the top.
 

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There really is not a good place to take it. It needs to cross under the tranny to get away from the fuel lines and ds. If you remove the cat and muffler you can straight pipe it out the side of the Jeep, but that is probably illegal, if you care. On a CJ-5 I had I exited the exahust forward of the rear shackle between the frame and spring and out the side.
 

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It sounds like you don't hav e top on your rig, and the fumes are gettint caught back in your "wash" (I don't know what the vaccum behind the vehicle is really called.) So what about turing it out toward your tire? Not "ON" the tire but somewhat of a down and to the side exit. I bet it will make a big difference.
 

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I'm figuring out a YJ exhaust problem too. I just did a SOA with the shocks angling up to the center. Just got my Sam's Off Road traction bar, and there's no room for exhaust. I just welded something together - I'll see if it works tomorrow. Coming right off the cat I've got a 23" glass-pack (clearance for the traction bar), then after that a 180* up and forward and out the front of the wheel well between the frame and the body. We'll see if it doesn't burn up the flare. And no, I'm not taking the flares off. I've already gotten 3 tickets the way it is.
 

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how big a body lift did you have to put on to fit the exahust inbetween the frame and the body? I would like to see a picture of that.
 

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I'll take a picture this afternoon when I'm finished. No body lift.
 

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I use to have mine run like that. I got the usual carbon monoxide fumes, but that just made for interesting wheeling.
I just cut the pipe coming out of the mufflers outlet and put a tip on that points downward. The rest of the exhaust was pulled removed past the muffler. That way nothing to crush on rocks rearward.
I would NOT run without a cat because you'll sound like a f*cking rice burning lawnmower...kind of a been there, done that and f*cked up.
If you run with the top on make sure the rear is zipped up and attached to the tailgate bracket.
 

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A down turn at the end would probably help. Also, never ride around with the back window out and the sides zipped up. It'll just suck it all in. You gotta have your windows (at least one) down, if you take out the back window.
 

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I kinda like it to dump out after the header, the lowder the better. <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/rolleyes.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/rolleyes.gif" border="0">
 

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Under the sheets. Makes the woman give you dirty looks
 

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Originally posted by Brent (aka)borton:
<STRONG>I kinda like it to dump out after the header, the lowder the better. <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/rolleyes.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/rolleyes.gif" border="0"></STRONG>
Unfortunately, I know just how loud that really is.... I just got a borla header for my 4.2L and also just put on a Sam's anti-wrap bar and had to cut the exhaust because it was going to be in the way of the new cross member for the anti-wrap bar... It is loud as FAWK! I have to wear ear plugs while I drive it. Im going to put the new exhaust in it this weekend so I dont get in trouble for having a open header... <IMG SRC="smilies/biggrin.gif" border="0">
 

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On my '87, there was no cat on it right from the factory(looser regs in Canada), I had a skid plate protecting the oil pan, tranny and exauhst, and then removed the stock muffler, and ran just a glass pack above the t-case x-member. The tailpipe then turned out and went between the frame and the rear spring pack just behind the spring hanger. It was necessary to slightly flatten the tip, making it sort of oval in shape.

This worked out great!! Not to loud, nothing ever got damaged or even scratched, it was out of the way of all suspension, and the exauhst exited into the disturbed air around the tire, so very little got sucked back in.

Only drawbacks are. Glass packs are glass packs... not too loud to me, might be pretty offensive to others. If you are right up against a dirt bank, the exauhst will blow the dirt up into a huge cloud all around you.
 
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