Thrush turbo 2. Comes in two flavors, welded, or rolled. About $30 for rolled, $50 for the welded. Not as loud as the flows but deep rumble. People notice. Couple bonuses here...you just saved some bones for a awesome exhaust tip. In addition, a quieter muffler will make fewer people look at you, and in turn all jeep enthusiasts, in disgust. If you do any off road terrain a $50 muffler hurts a lot less when that sharp rock or loose branch you didn't see on the log you just drove over smashes it.
Last edited by Relicmoto; 05-13-2013 at 10:44 PM..
Reason: Fixed the asterisk appearance.
I have Flowmaster through Borla headers and it sounds much better, but still a little high for my taste. I wish it was a V8, nothing you put on the 4.0 will give it that low rumble of a big block motor, I love the sound of my flowmaster on my 2500 HD.
I have a FM 40 series on my 87 with the 4.2
Single inlet, dual outlet with dual pipes to the back corners - all 2-1/2" pipe
Nice deep throaty sound - I've received a multitude of compliments on it
But this same muffler on our 92 with a 4.0 sounds nothing like it
It's quieter and smother sounding than my 4.2
Handicapped license plates are not for mentally handicapped people -
"Man has not yet evolved an inch from the primordial slime that spawned him." Mark Blankfield, Jekyll & Hyde... Together again
I installed a new exhaust in my wife's YJ a while back. Used a Dynomax Ultra Flo welder muffler and it sounds pretty good IMO. Here are a couple videos I found of YJs with this muffler. The last video is my wife doing a drive by while I was teaching her to drive the Jeep.