Rasp!!!!
My DD muffler on my CME setup sounded good with LT's @ ORY but my SLP muffler puked out all the packing and it became loud as hell and started resonating inside horribly. I then went with Corsa and loved the deepness and tone but that sucker was loud with an ORY. Not much rasp with an ORY but noticeable around 2200-2800rpms. Adding a bullet in the I pipe helped but it was still too loud. Adding cats made everything perfect and it sounds great now. No rasp whatsoever.
I have a factory SLP DD cat-back on my Firehawk with an off-road Y-pipe. As WILWAXU {I think that's who it was} said, it still has a bit of "rasp" to it between about 2 grand and 3 grand. Below 2 grand- fine,,,, above 3 grand- fine. Sounds perfect {at least to me} at idle and at high rpm.
The rasp gets on my nerves a bit, especially considering that it's centered right in the middle of the rpm range that you are in most of the time. I have thought about putting a bullet in the I pipe but once I got under there, I saw that I would have to cut my cat-back to install the bullet. I was hopeing to only have to cut the Y-pipe. The bullet's case would also be pretty close to my floor. I think I'll just live with it.
The rasp gets on my nerves a bit, especially considering that it's centered right in the middle of the rpm range that you are in most of the time. I have thought about putting a bullet in the I pipe but once I got under there, I saw that I would have to cut my cat-back to install the bullet. I was hopeing to only have to cut the Y-pipe. The bullet's case would also be pretty close to my floor. I think I'll just live with it.
