Just wondering which exhaust system for the 4D is the loudest(and still sounds good.) I had the borla axle back on my 2D JK but it was a little too quiet.

 

i wanted the same and everyone told me to get the dual gibson and i did. for me its too quiet but comparing it with my nephew borla its loud. hehe.

 

go with striaght pipe mufflers, (Turbo mufflers), those are loud...

 

The Cherrybomp glasspack

cherrybomb.com/products/glasspack

here is a 2.5L TJ with one:
http://www.youtube.com/watch?v=ZuWk8Uqrl-k


here is a youtube of one on a v6 sunbird.
http://www.youtube.com/watch?v=mv-lxo8cyM0

 

Cant tell you which to use if youre looking for loud, can tell you Flowmaster is a throaty sound which is probably too quiet for what you are looking for. Sounds likeyoure really looking for a cherry bomb or straight pipe sound

 

The gibson is so loud on my jeep i wish i wouldnt have bought it. Its really loud.

 

My flowmaster super 40 is just right. You can hear it, but you dont have to talk over it inside the jeep. Mine is under the drivers rear floorboard and ends right at the rear axle

 

That would probably be the one chamber flowmaster race muffler. I had a pair on my '65 Plymouth Valiant street/race car. Quiet is one thing it was nowhere near.

 

same here, i have the dual exit gibson and i wish i never got it its too loud but it deffinetly adds to the cool factor, just ordered the magna flow single exit i was told it sounds better and quieter.

 

The Pypes Violator mufflers are probably about the loudest mufflers I've heard although the high tones connote there isn't a V8 under the hood. Dampening the high tones is what give the perception of some muscle under the hood, otherwise it just sounds like you have a raspy 4 cylinder honda for a power plant.