wave Installed a Cat Back on a Reg cab , 8 ft bed , 4X4 , 1998 5.9 . Used a DynoMax System , must have been made out of some grade Stainless , was on the truck for 20 Years . NO problems , NO rust . drive Sold the Truck to a buddy , and System is STILL on it today . Can't vouch if they are built the same today . wrench Ronnie