With my old side pipes I could be heard a mile and half away when I rev'ed to 6000. Got pics to prove this.
Very loud pipes.
I changed to the Cobra Packs but I bought 28" (4" longer) and 3" I.D. My old pipes were 24" x 2 1/2" I.D.
I wanted them to breath easy at 6000 but have a good sound at idle.
The longer pipe is quieter at idle. Not a tested theory but with 6 or 8 of my Cobra buddies who are around me every week, we all agreed.
Sounds like a big block at idle and good mellow sound at 2000 rpm cruising speed. I can talk to my passenger without screaming. Best of everything.
I also install a pair on a KC 408 and a KC 427/487. Great sound for Cobra!
Dwight
you can not see the large chunk of my butt that is missing. He was four blocks away and heard me. No ticket.
