Muffler confusion!
 

Hey team. I'm going to be putting a flowmaster original 40 series muffler on my peej and i want to put it before the rear axle and use the remaining stock pipes for the dump behind the axle. However, the only Inlet/outlet (that i know if) is an offset in and center out.
Any ideas on what i could do to make this work? Can i even make it work?

help me out fellas! :rock::rock:

I used an offset in and offset out 40 series on my 09and it worked perfectly.
Check out flow masters web site and you can fine all the part numbers you need.

I'll take a pick if mine tommorow morning. Have a super 44 just like you described on my 2012. I clamped the 44 and the 40 on and took them for drives back to back and I think the 44 sounded a little better. Subtle difference, but the 44 is deeper tone. Check your local autozones and advanced autos and see if they have both in stock and test them like I did.

I ended up losing a half inch of clearance tho, not toooooo bad. It's a dd wheeler, not a hardcore crawler

would you be able to post a picture of it?

It was raining, still working on the picture. 40 and super 44 look very similar, 44 might be a tad smaller

awesome. thanks man. the only thing I'm concerned about is the offset inlet/outlet. I can't wrap my brain around how I could make that work.

The super 44 comes in a center in/ out. That would be ideal and you wouldn't lose any clearance. I have offset in and out (cuz i'm stupid and when i want something i want it now lol).

Anyway, i've run everything in the last month from straight pipe dumping under driver seat :eek2: to flowmaster behind axel ect. The easiest thing would be to remove stock muffler, and go 90 degree bend, flowmater, and pipe out the side. You can attach a rubber strap clamp to one of the bolts on frame.

The best sound i have come up with is to remove the resonator, add a section of straigh pipe (18"), clamp flowmaster somewhat vertically but slightly angled for clearance, the add a section of pipe out the back. (i didn't have any pipe on outlet at first and it was ok, but very droney). The pipe will make it quiter inside and add a little growl. I have mine 45'd under axel. For hanging, i used a rubber strap hanger right before flowmaster and attached it to one of the evap skid bolts above.

Another option is a flowmaster super 10 (2012 Jeep Wrangler Exhaust - YouTube). Thats a 2012 with no resonator and super 10. Just tuck it up there and add a pipe to dump before axel.

IMO, i'd go super 44 center in/out over 40, but thats your call. The 44 like i said is a little deeper and less tinny, not really much volume difference at all. Btw, i'm not saying the super 44 is the greatest thing ever, there are a lot of options out there. I know dynomax and mrpb are big on here, just haven't had any first hand experience with them.

Yeah the super 44 does sound awesome but i love the way the original 40 sounds. To each their own i guess? haha.
I'm planning on just taking the stock muffler out, and cutting into the stock pipes to put the muffler before the rear axle. the only thing im concerned about is how i'm going to make the pipes line up to and out of the muffler if its offset in/out, know what i mean? This may be a really obvious question but for some reason i'm completely retarded today and can't figure it out.

Also, where the hell is the resonator?

What year?. The 2012s have a big loop, join at a y and then theres a resonator under driver seat.




Attachment 319720

This is how i had it set up behind axel

2011. i believe the exhaust set up is quite different. i'm not gonna be putting the muffler in the stock location either.

Basically, all i want to know is if its possible to put an offset in/center out muffler in the stock piping under the drivers seat. and if anyone has done it to explain how.

It looks like you can.
Post #19, PM me him and he hopefully could give you more info.

https://www.jk-forum.com/forums/modi...-192491/page2/

Attachment 320328

Best pic I have for now. No you can't put it directly under driver seat. 18" pipe then flowmaster, yes you can make it work. That's what I did

bumppppppp

That would get torn right off with any offroad time. I have the same muffler on my 4dr jk in the same spot and it's 100% tucked up above the bottom of the frame rails.

Maybe less extra space on a 2 door

Plus the exhaust set up on a 2012 is different from what i've seen/heard.

Yes believe you are correct

This may be a n00b question. BUT. Is it: Long pipe after muffler=throatier sound
OR is it short pipe after muffler=throaty??

Nooob answer= vehicle dependent... 2010= completely different than 2012

Give it a few weeks to break in before you decide. Flowmaster super 44 plus 18" outlet equals pretty good

No pipe = more hum and resonation

Did you decide on one yet? I just ordered a super 10 today to try and see how it sounds. At 6"x 4" x 9" it solves the clearance issues

yeah i'm going with the original 40 series for now. See how i like it. If not ill most likely go with the super 44. i just gotta order it in!

Well I just got the super 10 on last night. It sounds pretty damn good!!!!. Fits right in front of the rear axle.. Pm me your cell of you want a sound clip. Don't feel like uploading to YouTube to upload here.

Longer muffler = quieter tones.

The longer the muffler the more "muffling" of the sound you have. Part of the reason most factory mufflers are 3' long.:doh:

MANY factors play in muffler /exhaust sound and resonace. Location of muffler, location of pipe, length of muffler and pipe...to many factors to say and one persons exhaust with a welded in muffler may sound different than anothers with the same muffler in a different spot. The Super 10 muffler is considered a "race-type" muffler but of course on a small displacement v6 it wont sound like the engines its intended for.

Very true.

I simply meant, and should have said, that for two mufflers of the same type, assuming same relative location on a vehicle, the longer one will be quieter than the shorter one.

A 14" Magnaflow will be louder under the same truck than a 18" under the same truck.

It doesn't sound like a race car. I've had the 40, super 44 and now super 10. It's not obnoxious and has a nice tone for a v6.. Similar to 44 just more aggressive

Flowmaster 10
 

Here's how a flow master series 10 sounds like on a 12 JK

12 Jeep Wrangler Exhaust - YouTube

I dont know if thats with or without the resonator but thats fairly crappy sounding to me

Oh i know it wont sound like a race car...thats just what they are made for. And they dont help a race car sound like race car...they are just enough muffler for cars that race at drag strips that require mufflers.

On the last TJ I had I put in a 2.5" high flow cat, all 2.5" pipe, flowmaster before the rear axle, 3" rear pipe and dumped it facing down just inches behind the rear axle, it was definitely the best sounding Jeep (6cyl) I ever heard, I plan on doing something similar on my 12, upsize the pipe after the cats, true duals (if possible), flowmaster(s), and some 3" pipe dumping just over the rear axle (facing down). The shorter the total length the louder and racier it will sound, the larger the pipe the lower the sound (and obviously the muffler impacts it a lot).

The muffler shop charged me less because I was using less pipe and it was about half the price of a catback system.

Not only would it sound nothing like you inline 6cyl jeep...true duals will actually be a serious pain with trying to fabricate it and if all the tests are right you will lose a great amoun of the trq curve by losing the balancing tube in the exhuast...ie the doughnut

Also go to big on the pipe and you are just wasting money