Guy's. I'm currently building new side exhaust from 321 stainless steel, I don't mind an agressive exhaust note and I want a lighter overall exhaust system.
The heavy restrictive muffler will be replaced by a silencer that fits my needs, the Vortex Cone 4" dia., it slips between the collectors and the primary pipe. Supposed to be 27-36hp gains on a 450hp engine! I don't believe it, but at least it will be less restrictive and lighter in weight than the factory SPF pipes. The down side, way noisy!! I guess?
www.dynatechheader.com or for custom made stainless mufflers etc!!
www.burnsstainless.com