For those of you that think standard pipe won't hold up. I built a 3 1/2" mandrel bent weld together system in 1991. The headers and pipes to the mufflers are still on the car. I did have to patch do to rust in one area. My second car has TTI aluminized pipe 2 1/2" system. Been on the car 10 years. Stainless is nice, but costly. Personally for the cost of the TTI system is a decent bargain. Driven a 64 fury convert with the TTI 3", it's plenty quiet. A last note I've back to backed my 11.00@ 3890lbs street car with both Flow Master and Ultra-Flow. Very little difference in E.T.
Doug