with my modluar loud mouth 1 i deffinatly noticed a difference in power im very pleased with it,it fit real nice too, just remember that everyones deffination of loudness is different, all i have ever read is how loud this exhaust is. how much drone it makes and the interior noise is very loud, i was let down a little in the sound dept, from what youll read or have read i was thinking it was going to sound like open headers, its not and is now way near that, it think its perfect, its loud enough but not overly loud, i was going to get the loud mouth 2 but got the orignal, very glad i did get the orignal, with a ory it might be a tad to loud for some, i have stock cats right now with the stock y. i just switched to a bassani y with high flow cats, its a little louder and im very pleased with it.

 

Do you have headers?If you remove your cats and your Y it gonna be a whole other sound.Like a huge dump truck!

 

94 z28- loudmouth 1 - mac mids- ypipe-off road pipe. i think my car sounds bada$$ and everyone else loves it too. sounds real mean with my s-trim and BOV