Metlic53

yeah, i'll take it to a exhaust shop and see if it can be done with enough room to spare.
ONE MORE QUESTION. would it be better to buy a header that has all six cylinders connected or one that is 3 pipes and an out and 3 pipes and an out? so dual outlets for header or one outlet?

superj

the newer cherokees come from the factory with the two piece manifolds so it would probably be better to do the three pipes into one style.

DagBMX

depends. if you ran a header that has all 6 combine into one y-collector, then running one pipe to your muffler and then splitting it out the back is the easiest. running a header with dual collectors (the 3-out and 3-out as you stated) makes it easier if you want to run two separate cats and mufflers, kinda like the E30 Bimmers some of the guys were talking about earlier. usually you have to spend more in the install because you then basically are running two set ups out the back, even though these do typically get you a little more power. most of the headers i have seen like this though for jeeps have some type of y-pipe that recollects them back into one outlet, but you can opt out on that when you install it. for cost effectiveness in the short run would be a header with one outlet on the collector, and then y-pipe it after the muffler, just keeps material cost down. pipes are cheap, but the cats and mufflers will leave your wallet a little on the light side.

Metlic53

if one y-collector is easiest i will probably do that, i figured i'd have better flow with 2 outlets on my header. wouldn't it be about the same thing i have had a y-connector connect the dual outlet header? the header i want comes with a y connector so cost wouldnt be much more and the y connector would allow it to be one pipe, so dual header running into y pipe = one pipe all the way back. sorry if i confuse u

DagBMX

naw, we understand perfectly.

but yeah, basically that's it in a nutshell. like i said, we are not making really enough power to need to run two pipes off the manifold back, and one pipe split after the muffler is cost effective. if the header you are ordering comes with a collection pipe running it from two to one outlet, you are already figuring that into your cost anyways. but, say, you wanted to drop a stroker into it later on in the jeeps life, running dual might not be a bad idea, and having that manifold would have you one step ahead of the game.

Metlic53

i think im going to just do what u said earlier, get the APN header, and y pipe it after my muffler. i'll see what the exhaust shop says about running exhaust on on both sides and see how much its going to cost me.
would i have a different tone with y piping it after the muffler?

XJ4life92

ya know, i had a straight pipe (just cat) for about a week. wasnt that loud. i was quite dissapointed. i cut out the stock muffler and put in flex pipe untill i got out and bought a cherrybomb glasspack. i still love the glasspack.

Flightrisk

Clifford makes a split manifold for the 6 and claims 18-20% increase in HP.
http://www.cliffordperformance.net/M...gory_Code=J258

t1320t

I'd love to see some dyno #s before and after you do the duals. My money is on you actually losing power. Or at least you'll lose it down in the usuable power range & possibly pick it high in the RPMs. An engine is an air pump.. if the head isn't passing enough air to necessitate a freer flowing exhaust system, why do it? If you just want the dual exhaust look then just mount a second tip on the driver's side.

djritter1122

http://www.cardomain.com/ride/2534814
looks good

captainofiron

I have seen a double tri-Y set up on I-6's

But I think on an XJ you would have some scavenging problems at the collector if you split the manifold into a dual tri-y set up, you cant compare all I-6s and call it a day, because you have to consider timing and how the cylinders fire order and how the exhaust is routed

the collector should be seeing a pretty steady flow of exhaust gases so you dont get any backflow up one of the exhaust runners, which would cause a major power loss and back-pressure issue

that is why "tuned" headers are so much more expensive, because somebody paid alot of money to a engineer who did the gas dynamics and flow to equalize the exhaust pulses at the collector by changing runner length and shape to increase scavenging and flow

DagBMX

from what i have experienced, splitting after the muffler stills gets you a a slightly higher pitch to the exhaust note than running a dual cat and muffler set up. because instead of splitting the gas into two ways, it's all coming out one way and has a slightly higher pressure. it's basically just resonating the gases faster because you have to push more out of one opening. the pipe size also plays a roll as well, smaller diameter pipe is also going to raise the pitch, and the larger you get, the lower the sound gets (throatier).

superj

for some reason, chrysler split the factory manifold into two-three exit so they must have done some testing, right? that is another reason why i figure you guys would be fine with dual mani set up.

captainofiron

not necessarily, it could have been just easier to manufacture that way instead of having a giant collector that has 6 pipe inputs

As far as performance gains look at my post above, scavenging is the reason guys with V-8s get h or x pipes installed, to balance exhaust pulses and improve scavenging, you never want stagnant exhaust gas in the pipe

Metlic53

mine is a 97 which the engines are pretty much about the same but mine was really loud!. it sounded like it was cammed, didn't sound to good at higher rpms though. idling it sounded awesome.

I'd wanna see dyno proven results before i'd cash out almost 400 bucks for one of those....

mount a second tip? so that tip wouldn't be connected to anything, that would be retarded. all my buddies would laugh at that haha.