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So as stated in my previous post, I'm about to replace my down pipe, muffler, cat, and tail pipe due to rust and holes etc. 1989 Pioneer 4.0 5 speed manual. Thinking now that I'm replacing everything else, I should replace my manifold while i'm at it. Looking online for pricing and it's a bit expensive compared to everything else. I found stainless steel headers for way cheaper but they say they are for a 91-95 (or something) Wrangler and Cherokee. Cheaper and better looking. Will other 4.0L exhaust manifolds fit on our MJs 4.0, without heavy modifications?

I am in the process of replacing my manifold. I am not gonna weld it where its cracked am gonna buy a new one. I am working on a 89 4.0 L not worried at all about the old exhaust system, itll be replaced next thing front to back as i believe the cat is stopped up. And the muffler has a monster hole it. Sounded like a race car when i would get on it First question: Been searching around for a couple days looking through page after page of Aftermarket header and manifolds. Would love the Pacesetter Header!! :bowdown: http://www.quadratec.com/products/77604_701.htm?gclid=Cj0KEQjw_9-9BRCqpZeZhLeOg68BEiQAOviWAnToJbPH-5vxW46kg5PLt_olHbmCY-xh-nh__t5iPwcaAu998P8HAQ but for $233! I am gonna keep looking around. Found some good ones and then i ran across this http://teamcherokee.com/exhaust-manifold-assembly-cherokee-comanche-4-0-liter-1991-1999/ the First and sixth tube have flex joints made into them. Very cool cause this is were alot of them crack. I was Planning on doing the flex joint around the bottom near the oil pan anyways. I personally think that this thing looks cheap and is also cheaper then you can find a stock one on most sites and in parts stores... I did how ever run across this one http://www.1aauto.com/1987-90-jeep-exhaust-manifold/i/1aeem00024?f=333781&y=1989&utm_campaign=gb_csv_br&utm_content=EEM&scid=scplp1AEEM00024-333781-1989&sc_intid=1AEEM00024-333781-1989&gclid=Cj0KEQjw_9-9BRCqpZeZhLeOg68BEiQAOviWAnZjAW36YgBeYDxnpH4TpcM-DeNf6DDZ6O6kdTv65e0aArAF8P8HAQ Second question: Is a header really gonna make a difference compared to a stock manifold? If so what kind? If you guys have had any good experiences with buying a replacement manifold or a header let me know! I am open to ideas

I'm installing a new exhaust system on my MJ including a new exhaust manifold, pipes, cat and muffler, all stock. Can this be done without disconnecting fuel line to the intake, the vacuum hoses and the throttle linkage? I'm thinking I may be able to slide the intake back a little, support it from above (couple of 2x4s across the fenders and some straps or rope) while removing/replacing the exhaust, and then slide it back in place and bolt on the manifolds with a new gasket. What's the best way to do this?