I thought long and hard about this tarry, gooey, sticky, never to be removed easily under floor insulation.
My decision was not to use it.
Since I'm going with 2.5" stock manifolds, it should cut down on decibels considerably.
The engine will get about 6-10 mpg. Certainly not a daily driver qualifier.
As far as heat: I do have a special insulation (NASA good stuff thats not sticky) on the floor areas that keeps heat from penetrating into the interior. Keeping heat out is more of a concern.
I like to hear the engine when I drive.
I don't care about my stereo sound quality and what it'll sound like. Bring your ipod if you want to listen to music.
If you want to talk when were driving, save it for when we get back. Or at least minimize it. Beers will be cold when we return. Chill out and talk then.
Drowns out the bump music next to me while in traffic stop light.
Hear it weighs alot but either way I don't care. These cars are heavy enough anyway.