2005 truck with 115K miles. I have a cracked weld on the cat on bank 1 (passenger side on NAS truck). Getting tired of SES light coming and going at will. Unable get dealer to cover under warranty due to calendar time on truck, so up to me. Genuine is about $1600. Magnaflow is available from Atlantic British for about $675. Some say never get an aftermarket yet they offer a 25K mile warranty. Does anyone have any experience with these or other cats for these trucks? Would appreciate any input.