Originally Posted by Box_Man
The problem with aluminized steel piping is that it is thin and it melts. It's so thin that the exhaust will resonate and make lots of noise. I have some aluminized piping in my exhaust system currently. One section, which is about 2 feet long, and just before the axle, has a big triangle shaped spot about 10 inches long where the pipe had started to melt, quite impressive, really.
How thin? RB uses .120
Straight from RB's website:
"Racing Beat's Road Racing Header is the first step in building a serious racing exhaust system. The engine-to-pipe flange is flame cut from 1/2-inch thick flat steel. Like all of the headers we manufacture, the Road Racing Header is constructed with 2-inch O.D. mild steel tubing, .120-inch inch wall thickness, and mandrel-bends throughout."
To the OP:
Also, the OEM exhaust system is not made of SS, is made out of steel.