by spitfire9137 » 07 Mar 2005 2:51
From the TTI site:
TTI Exhaust Systems are made of 16 gauge aluminized tubing and are mandrel bent for a smoother, rounder finish.
May not be what you want, but they come with everything you need to hang them, and they will fit like a glove. They also make kits to hook their system up to stock manifolds.