Exhaust weight

My TTI 3" X-pipe and bullet Dynomax mufflers ending at the rear end weighs around 50+ lbs. Stainless won't be significantly lighter than mild steel unless it's thinner. I actually wanted the extra weight of an exhaust system for the class I ran and it helped ET in my particular combo. But even if there is a weight advantage with a stainless exhaust system, I can't see how it would be worth the weight reduction considering the labor and/or expense.