XP Series For the ultimate Dodge exhaust system check out our “COOL DUALS”TM a full 4" turbo back system that exits into a full dual exhaust set up all in 4" tubing. Finish off the system with a set of show quality polished 5" stainless diameter exhaust tips behind each rear wheel. Cool looks, cool sound. If you want cool this is definitely the system to have. Installation Instructions.pdfVideo.wmv Verify Gooseneck and 5th Wheel Hitch Clearance