Has anyone bought an exhaust system for a 99 Trooper 3.5? No aftermarket parts available. All aftermarket books in US call for a 3.2 engine when all the US Troopers have the 3.5. Dealer prices: Muffler- $550. + tax Tailpipe-$270. Labor- $130. So, muffler and tailpipe $950. + No wonder they can't sell them.