jeeperscreepers92

Yep. What you put in is what you get out. lol. GIGO. BUt i like the rep[aint with rusteloum high temp paint. cheap, yet very effective.

austinjoe13

It lasts on the tubes but burnt off on the collectors, just saying

JeepsAreForSpeed

anyone know if anyone makes a dual outlet header with 2 1/4 inch collectors for a true dual? I have the pacesetters now but they are only 2 inches each.

austinjoe13

That's the best you're gonna get cause there's really no room or need for true duals. You'll probably lose some low end with that big of pipe anyways

1991Jeep_Man

Doubtful. I plan to hopefully run 'duals' (dual outlet muffler) and expect no loss in low end. Why? Because my header primaries and collector are staying the same. The downpipe will still be 2.25-2.5". Combine that with the fact that the 4.0 has cam overlap to assist in scavenging, opening up the back end of the system won't harm performance (unless you do some ignorant 5-6" fart exhaust, then yes you'll have exhaust turbulence). I had a good discussion about this with some fellow co-workers who build dragsters and big number street warriors. I learned a good bit.

JeepsAreForSpeed

thanks i'll have to get mine cut and rewelded then. Im in the process of making an aspirated 4.9 stroker with a higher powerband so i need two 2 1/2s or one 3 inch to get the full power out of it. Guys at the stroker site didnt know.

michaelOH

How do people raise their exhaust? Currently The muffler and cat are the lowest thing under it and I already ripped them off once so how do I get it above the Frame rails

austinjoe13

Have a new one bent up and tell them to make it high and tight

wiggles

Its high before the cross member, cut it and make your own exhaust after that.

MAJHMR

I'm starting my first build (XJ Virgin). I have an '01 XJ stock. Primary use will be DD and Southeast US mud slinging. I'm looking for recommendations for brands and models of mufflers, exhaust systems, exhaust manifolds as well as do's and don'ts. What works, what do I need to avoid? Most of my off-road experience was in Iraq and Afghanistan and I got the bug there. For some reason the owners of the vehicles I used frowned upon personal expression in tweaking my rides. Who knew?

austinjoe13

Go about five pages back and read back up to here. You'll probably get a better idea than if we just list a few

MAJHMR

APN Header
performance curve cat
Magnaflow muffler
2.5" pipe, welded if possible

Greatly Appreciated.

Tom95YJ

That's my exact setup !

There are videos of it on one of the last pages of my build thread.

But if your lazy here's a video

MAJHMR

I watched these last night. Very nice. I assume, the suspension lift should come before the exhaust upgrades to ensure proper fit of pipe?

Tom95YJ

it'll fit he same either way unless you have gone to a coilover rear setup which would require custom