Banks Power GM 454 Mh (EFI) - 179in-208in WB SS Extension Pipe KitBanks Power Extension Kits are made from durable galvanized T 409 Stainless Steel. These kits come with necessary hardware for the applications listed in their description. Exhaust Extension Kit, Stainless Steel, for use with GM 454 Motorhome EFI, 179 Inch 208 Inch with B Wheelbases Extension kit, stainless. Includes 3. 5 inch x 45 inch Extension Pipe. Includes heatshield and hardware. Incl. Heat Shield And Hardware This Part Fits: Year Make Model