DagBMX

oh, for sure, i mean, what else do most mufflers do, along with manifolds and what not? there is always going to be something lingering.

superj

Deja vu!!

Before you dump it, check your local emissions/safet requirements. In the county I live in, you cannot dump your exhaust or have your tail pipe exit the car before the rear most exit to the cabin.

Most people dump their exhaust because they saw a hotrod with it and thought it was cool and did not know what they were actually doing. Dumpd are for high revving high horsepower drag/hotrods. Dumps only make a lot of interior noise on moderately built or stock cars because the exhaust reverberates under car abd is loud and annoying. (And I am a hotrodder and love straight pipes and glasspaks). In theory, yes, they are not cutting down on hp by putting bends in the exhaust but in reality that type of hp is only going to be extracted by you 30k motors in drag cars or nascar style engines because that final few little horsies is the last bit before the motor is topped out.

For you and I and our mostly stock or stock motors, a single pipe, probably 2.5 to3" with a decent header and straightest flowing muffler is the best thing we can in hopes of freeing up a pony or two.

Metlic53

i've heard 2.5'' piping is the biggest you can go on the Xj's

red97cherokeewithsunroof

you can bottle neck at the end but its probably not good

98jeepsrt6

well heres a jeep L6 with true dual setup.. IMO this would be the way to go since that whats next on my list of upgrades pacesetter header split 3/3 either straight back or two flowmaster 40s

t1320t

I've seen a few posts about exhaust diameter... Keep in mind that the diameter can be reduced as it gets further from the head bc the exhaust gases have cooled down. Cooler gases=smaller gases=they don't require as large of a diameter pipe... just something to consider.

Metlic53

man i get so many different opinions.......i was just planning on putting 2.5" piping all the way back and be done with it...........

Flightrisk

There you go. You have been overthinking the whole thing anyway. Consider what you plan to do with the vehicle.

Side pipes mean lots more noise closer to your ears which will tire you physically as you drive because your body actively works to resist noise especially at lower frequency and sub-sonic levels . Driving a noisy vehicle for any length of time is a drag.
Consider that a slowly operating vehicle will be have more exhaust closer to the cabin. You'd be sitting in its cloud.

Metlic53

i haven't been really overthinking, just wanted to see if i could dual it. i've seen dualed jeeps (XJ's) and they look and sound pretty cool. This is what i've come up with, i'm going to the get header from ineedpart (APN). run 2.5 inch exhaust from header back, magnaflow high flow cat, Flowmaster super 40 (already on vehicle) and put a dual of single 3.5inch tip!

red97cherokeewithsunroof

I like the mix. Stop talking about it and do it already!!!

duncan0668

I have not changed the exaust on my Jeep, but I did on my Harley. I changed the stock pipes to Screaming Eagle, I lost both HP and torque so be carefull what you wish for.

Metlic53

I will! its easier SAID than done, plus this costs a little bit of money. For an 18 year old going to college, 4 classes, and working 35 hours a week i dont have all the time in the world to get out and do this ( or the money ) it probably wont happen for a couple months!

98jeepsrt6

Finally an update:
Well i have the true dual setup with flowmaster super 44 mufflers.. 2 1/4 piping... with turn downs(Temp until suspension is done)

I will have pics and vid up later this week for you guys to see and hear!!!!

djb383

What-a-tease, c'mon man, post 'em up, git 'er done.