I would imagine a system made from alum would have quite a different sound than mild steel. Almost everything out there is made from mild steel... from the primaries to the tailpipes. Stainless has quite a different sound, and as much as i'm obsessive and anal about weight savings, i'll be building a stainless system for that reason... they just sound cool. I'd think an alum system would be quite muted sounding, especially if the mufflers are aluminum too.
I'm a Spintech fan... and i'll be hoping they can make basic models out ov stainless. I wonder if they'd make them out ov aluminum if asked too? They are a very creative lot.
I know i'll be taking a big hit weight wise with a stainless exhaust, especially as it'll be 3", but at least building a T/A Challenger i dont need tailpipes. I built a 3" mandrel X-pipe system with Spintechs and T/A style exits for my 72 Charger (so maybe a few inches more pipe total), and it was pretty damn heavy...
