Dunno what you mean by oval or spin...

But the correct muffler is 2.25" CENTERED inlet and 2.25" offset outlet.

 

I was taking a look at the Thunderbolt cats, and they had a category for oval cats or spin/spun.. Not sure what that's about, as I said, this is my first time doing something like this.

I looked up the parts on performance-exhaust and this is the cat and muffler that they're saying work with it:

http://performance-curve.com/96-00je...25land40l.aspx

Is this a decent cat? Or should I go with the thunderbolt? If so, which thunderbolt one matches the fit?

 

http://performance-curve.com/410225-...converter.aspx

This one

 

thank you man

 

For a muffler OE is 2.25" Center / Offset. We use a 2.5" Center / Offset in our kits. However if someone is custom bending pipes for you pretty much any muffler will work.

Here is a page I threw together. It will show the OE exhaust for each Cherokee. Look at the clamp size before and after the converter, this will tell you the exhaust size. M214 = 2.25", M212 = 2.5" http://performance-curve.com/cherokee-2.aspx

The ovals used to be the standard for converter sizes. The spuns (round) came out to use on vehicles that an oval wouldn't fit on. It makes no difference if you use an oval or spun, it's all personal preference. Several vehicle manufacturers are starting to use spuns as OE now.

 

Thanks for all the info mudfrog, I'll be ordering my cat (and whatever else you have for the setup) through you. I've been hearing good stuff and I just saw your other thread. I'm lovin the prices (probably the first time I've said that in a while). Thanks again

 

which headers would you guys recommend, pacesetter or gibson? i have read reviews on both, they both seem good, but gibson seems better. my question is, is gibson worth the extra money? i already have a cold air intake and a cutback exhaust. i need to replace my manifold anyways so i might as well upgrade

 

I had a crap pacesetter on a jeep and it cracked in like 3 months. I have a banks and its sweet!

 

This one,


http://www.bankspower.com/news/show/...ith-a-revolver

 

http://store.sandmansauto.com/search...emid/2771-1533
No reason to spend a kabajillion and seven dollars on an exhaust header for a 4.0... my Dad's TJ has run one of these for almost 20k now...

 

Thats a super good deal, did he see any performance gains from it?

 

I'll go with the Gibson then. It's pricy but after reading lots of good reviews and a few people recommending it, along with you saying pacesetter is no good, Gibson seems worth it

 

Are Flowmasters reversible?

 

^ no they are not. The word inlet should be stamped on the case.

 

hey got a question for all of you gear heads out there! so back in october i bought a 2001 jeep cherokee and have done allot of work on it. i got a 12'' magna flow glass pack and resonator for it. it sounds really good but i would really like to make it have that crackle sound at idle like allot of muscle cars and hot rods have. i wanted to know how i could do this. this would be the best place to ask so any ideas? its a straight 6 4.0 liter not the high out put addition. thanks!