Exhaust Systems

OBX KJ · **Posted:** Thu Jan 26, 2006 4:45 pm

No, they have always offered application recomendations. No discount

l337fpc · **Posted:** Thu Jan 26, 2006 6:45 pm

So what is the most effecient way to reduce backpressure when removing the stock muffler and putting in a flowmaster 50 "SUV" series?

OBX KJ · **Posted:** Fri Jan 27, 2006 2:55 am

l337fpc wrote:

So what is the most effecient way to reduce backpressure when removing the stock muffler and putting in a flowmaster 50 "SUV" series?

The OE muffler causes most of the backpressure, so by replacing it you're there. As with most mufflers, the Flowmaster will get a little louder as it breaks in - be sure to resist the temptation to leave the tailpipe off.

l337fpc · **Posted:** Fri Jan 27, 2006 8:03 am

Alright i won't but i have another question. does the exhaust tiip matter for anything other then for show?

SavageSS27 · **Posted:** Fri Jan 27, 2006 9:02 am

Actually, yes, the exhaust tip is EXTREMELY important in the performance of the rest of the exhaust. As long as you stick with something about 5" in diameter, or larger, with 8 or more LED's on it, than you're all set...i've dynoed them at about a 50HP gain :-P

Just kidding, as far as i know, tips don't to much if anything to increase, decrease performance, as long as you like how it looks, it performs great...

OBX KJ · **Posted:** Fri Jan 27, 2006 9:08 am

Tip, no. Diameter of the tailpipe should be in the 2" to 2 1/4" range. The larger diameter will deepen the tone. If you are going to lift your truck, you might want to do that first as the angle of shocks, arms ect. may change, therefore changing clearances.

OBX KJ · **Posted:** Fri Jan 27, 2006 9:10 am

What would be the gain if you have atleast 8 LEDs AND dual tips? LOL :lol:

l337fpc · **Posted:** Fri Jan 27, 2006 11:32 am

SavageSS27 wrote:

Actually, yes, the exhaust tip is EXTREMELY important in the performance of the rest of the exhaust. As long as you stick with something about 5" in diameter, or larger, with 8 or more LED's on it, than you're all set...i've dynoed them at about a 50HP gain :-P

Just kidding, as far as i know, tips don't to much if anything to increase, decrease performance, as long as you like how it looks, it performs great...

Thats how you cheaply increase the horsepower on your typically primer paint jobbed import's.

So for the most part the tip is for show unless the diameter is increased in order to change the exhaust's tone if need be.

If i was going to do a frankenlift in the next year, would i really run into problems if install a flowmaster muffler? Because i really don't think i would run into any problems...

JeepJunky33 · **Posted:** Fri Jan 27, 2006 4:00 pm

I think I got lost somewhere in catching up[ with the conversation. If all your doing is replacing the muffler, taht means that you are keeping all the same plumbing. So what is this talk about clearance? I have a rusty's 2.5 lift after the tires it comes to about a 3inch in the back and 3.5inch in the front lift. (that was off the topic sorry just wanted to brag) anyway...If the flowmaster 50 is shorter then the stock then why wouldn't they just add however many inches of piping onto the exsisting exhaust? Confused yet?

OBX KJ · **Posted:** Fri Jan 27, 2006 4:59 pm

Confused, NOT! Been married for 14 years - you got to try harder than that. If you are just replacing the muffler, and keeping the OE tailpipe, you should be fine.

l337fpc · **Posted:** Fri Jan 27, 2006 10:18 pm

good, my questions are solved. Thank you.

gsbrockman · **Posted:** Sun Jan 29, 2006 11:35 am

OBX KJ wrote:

the Flowmaster will get a little louder as it breaks in

How can a Flowmaster "break in" when it's a baffled system with no packing ?

Anyway, the Magnaflow #15870 cat-back system works great on the CRD's....follow this link :

http://www.lostjeeps.com/forum/phpBB3/vie ... php?t=5228

Greg

OBX KJ · **Posted:** Sun Jan 29, 2006 4:06 pm

In a word... rust. Consider the amount of moisture that goes thru the inside of an exhaust system. Ever seen a vehicle have water poor out of a tailpipe? This is why many mufflers have a "weep" hole in them.

The Flowmaster is very strong and will last a long time. My 91 F/S Ram is only on its' second one @ 185k. My 93 Ramcharger is still one is first @ 137k and my 00 TJ is still doing fine @ 110k.

Yes, I like Flowmasters AND Chrysler Products!

streetKJ · **Posted:** Wed Apr 19, 2006 5:11 pm

Here's some pics of a Borla XS muffler welded in my KJ from behind the cat. The original tailpipe tubing is left intact. It's a crappy weld, but what do you expect for paying $110 for the muffler and $35 for labor and waiting 20 minutes to get it put in. I'll try and record sound clips soon, but I might need some help from the tech saavy people to find a place online to host it and create the links.

CaKJFreedom · **Posted:** Wed Apr 19, 2006 6:16 pm

Wow that's clean! I think mine looked like that underneath for about a week.

MikeD0106 · **Posted:** Wed Apr 19, 2006 7:46 pm

OBX KJ wrote:

What would be the gain if you have atleast 8 LEDs AND dual tips? LOL :lol:

I think a larger single tip with the LEDs will get you the most gain. :lol:

Oh yeah... Don't forget to add stickers... LOTS AND LOTS of stickers. Instant HP gains. About 2HP each depending on the size of the sticker. :wink:

Wahoo650 · **Posted:** Wed Apr 26, 2006 10:08 am

Thought I'd throw some more exhaust info. in here rather than start a new thread.

Just put the Gibson cat back on my '02 sport. Nice burble at idle, a bit of a drone from 1500-2000 rpms. Feels good by the seat of the pants. Still doing mileage checks(haven't run a full tank yet).

As for installation, it's a straight bolt in. I had it up on ramps at the rear wheels and was able to get the stock system out, but could not get the new tail pipe in! Had to take it off the ramp, jack it up and use jackstands on the frame so the axle would drop for clearance. Should have just started out this way. Anyway, no leaks, no rattles, a good quality fit.

Would I recommend this system... Yes and no. For the price, it's probably going to be hard to beat. But for off roading, the round muffler sticks down a little too far in my opinion. You can see it clearly from the rear as it is only a couple inches higher than the bottom of the rear diff.

Matt

KUCAK · **Joined:** Mon Jul 18, 2005 10:07 pm **Posts:** 10

I have the 50 Series on my 02' And need to yank it and replace it with stock to sell..

kj@best · **Posted:** Tue Aug 01, 2006 6:06 pm

the only way to have an exhaust system that flows too well is to cut of you catyllitic converters...........and that is not legal so none of us have to worry about an exhaust system that is too free flowing.

l337fpc · **Posted:** Tue Aug 01, 2006 6:51 pm

would it be possible to buy generic hi flow cats and then use them nad some new tubing for the exhaust system to make it a new exhaust system startin at the cats, rather then after the cats.

if all of that could happen, more performance would be gained when compaired to just a cat back system...correct?

Also, did anyone find anything out about new headers for our libby's? because that would be friggin sweet.

Exhaust Systems

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