anyone ever heard both and which is louder...i always heard LM was like the loudest catback on the market, BUT i had the rumbler on my other TA and i totalled it...now i got one with the loudmouth and i believe the rumbler was louder on the stock exhaust than loudmouth...

 

All of them are loud as hell.

The original loudmouth is going to be the loudest. The loudmouth II and the rumbler will probley be equally as loud.

 

the LM is the loudest.the LM II is a little bit tamer but not much.

 

loudmouth is nastier. Rumbler is more rumbly! lol. Seriously I had rumbler on my old car. Loudmouth may have been a tic louder, but the rumbler sounded much better and at WOT to me seemed just as loud. But hey what do i know, i only won best sounding exhaust with it.