The aluminum tube is 0.065" wall as well, fairly thin for aluminum.

I went from a full 3" system to the bumper with Flowmaster 2 chambers to 3.5" "glass packs" that dump before the axle. I wasn't expecting quieter, but this thing sounds like I'm on the infield during a nascar race when its "on the pipe"

In terms of messing up the balance...I removed 1% of the total weight. I have /6 torsion bars an no sway bars. I am not burning any corners. Besides, for a race car, you should probably make it as light as possible, then add ballast where you need it as necessary.

On a related weight-loss note, I had to get a tooth pulled last week. I am down 10 lbs likely due to not being able to eat too many solid foods, I doubt the tooth was that heavy...