Dudes. I have a 2018 JKU Sahara. 40k miles owned since new. Looking for a smaller muffler to replace this huge ass trash can under the Jeep. I absolutely do not want a loud replacement. I would like something as quite as stock but could live with a little more noise but not “hell yea!” loud.
Also, I’m not interested in replacing anything forward of the cat. I want all that intact. Just looking to lose a little weight and some bulk.
I had a muffler shop cut just aft of the pipe right below the driver seat and weld in a dynomax muffler and then repipe from there to exhaust out the back. Freed up lots of room.
i think any smaller muffler you out in will be louder than the old one. i think i used to use a California turbo muffler if i remember correctly it was bot bad and pep boys have them.
it's a v-6 ; how loud is it gonna get or good can it ever really sound? :wink_animate:
seriously, the Dynomax mufflers are the best sounding , lower priced option on the 3.8 or 3.6 in my opinion. Initially sound a little loud but quickly mellow to a suitable growl that isn't rattly or piercing nor like a slammed Honda fartcannon.
I use the dynomax , pre-axle dump but others really like it ,together w/ a resonator , on the Pentastar like OPs.
Somebody on some other site has a good write-up or video of it being used on an orange Pentastar JK , iirc.
On those Dynomax mufflers, what size can you fit in between the frame rails and driveshaft? I'm looking to change mine up too. I had a Flowmaster 40 in the back, that ****** was loud. Changed it to a Flowmaster 50 (little larger) and it's loud too. Hasn't mellowed at all.
Hard part for me is having a 2 door, so not much room in that area front to back.
The Flowmaster 50 series was the biggest can I could fit in front of the axle on my 2 door, and I wanted less sound.
EDIT: Note - evap needs relocation to put a Flowmaster 50 in front of rear axle on a 2-door.
I relocated the evap. to make room for the FM50, which was a huge upgrade over the MBRP muffler that was there.
I actually ran a Supertrapp diffuser for years to make the MBRP tolerable. Tailpipe was impossible at that time.
Recently I added a resonator behind the rear axle and it knocked off a solid (estimated) 3dB
Because of self-created obstacles, it took a bit of fiddling to get it done on my Jeep.
Hopefully it would be much easier if your rear suspension is not "odd" .
If you don't want to relocate your evap. canister, you could put a resonator inline ahead of the rear axle and a relatively large muffler post-axle. There's a straight enough section forward of the axle that cutting in a resonator is a cake walk. Rough rule of thumb: case volume is directly proportional to muffler effectiveness - there's no free lunch.
I had the Dynomax crawler set up. I really liked the set up but couldn't stand the drone at highway speeds. And this was with 37" Iroks and stereo appropriately cranked up. Went back to stock and I'm still looking.
Another vote for the dynomax pre-axle dump...quietest and least obnoxious i could find. Also, it’s cheap as hell and you can DIY. I recently bought another one of these mufflers off amazon for my brother’s bday for $62. I wouldn’t say it sounds good, but it’s acceptable lol. Nothing i listened too impressed me, but we all know you just don’t make a V6 sound good, ain’t happening
I really wouldn't know which one would fit your requirements but don't even look at Gibson (definition of a fart pipe).
My brothers daughter and kids were in the Jeep a couple of weekends ago , a ricer JK pulled up next to us (Gibson Sticker and all) and took off from the light and the little girl said "That Jeep just farted,Hehehe".
I laughed so hard tears were causing vision problems , had to pull over and clean the sunglasses.:laugh:
..
Ryan that one is for you .
i used the product below from Amazon. Worked great, I welded mine, but you could buy a couple cheap clamps as well. I cut some leftover exhaust tube to use as the turn down. I cut my original tube by the transfer case, added the muffler, then the turndown.
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