Yeah, that doesn't help in the cab. But even outside, at WOT it sounds like straight pipes. Wheatley and I were scooting around last night while he dialed in E85, you would have thought a Sprint Cup car was barreling down the feeder (and obeying all posted speed limits). It even scared two pedestrians a block away.

I am thinking that my 22" may be burning out on the inside and that's why it is so loud. It's probably 3 years old.

 

MMMmmmm E85, you lucky SOB !!!

 

AP, if you wanted louder, you should have went with the Magnaflow Race Series muffler like I have on my truck now. I got the 5x8x6" long body, would have to look up the part #, but its 3" in/out. I made the swap from the SLP resonator to the magnaflow and never looked back.

The magnaflow is fairly quiet @ idle(compared to the SLP), but WOT screams like a banshee. Mind you this is on my truck w/ stock manifolds and cats.

 

I just took off my slp loudmouth I as well. Got stock on there right now, enjoying the quietness for a few days until I can weld a dynomax bullet in there and reroute my pipes.

 

same here... my 18" used to be quiet now its loud as hell... i guess some on the packin material or somthing burns out?