Stainless steel, mandrel-formed tubes tune exhaust flow for maximum torque. Maximize exhaust extraction. Flanges welded on both sides, then milled flat. Seamless high-velocity collector. Exclusive tuned-length parallel 5-tube design. Patented PowerPickle pulse converter. 5/8 inch thick flanges won't warp or flex. Includes Y-pipe and heat shielding.Virtually indestructible 100 percent stainless TorqueTubes maximize exhaust extraction, unleashing gobs of torque. Exclusive tuned-length, parallel 5-tube exhaust manifolds designed specifically for motorhomes. 5-Year Limited stainless steel construction never cracks or blows. Mandrel-formed tubes tune exhaust flow for maximum torque. Patented PowerPickle pulse converter maximizes exhaust extraction (see the big PowerPickle). No sealant or gaskets required. 5/8 inch thick flanges never warp. Flanges welded both sides, then milled flat. Includes stainless Y-pipe assembly with a seamless Y-collector. Includes necessary heat shielding. Banks streamlined, stainless steel TorqueTubes are the industry's only parallel 5-tube exhaust manifolds for RVs. Unlike competitors who add a separate tube length to a 4-tube formation, Banks integrates five tuned-length tubes into a design that allows rotational firing of the cylinders through the exhaust, minimizing backpressure and maximizing torque. The thick, 5/8 inch flanges never warp or leak. Maximize exhaust extraction and torque. And check out that amazing Power Pickle! 5-Year Limited Warranty. Key Features:- Virtually indestructible 100% Stainless Steel- Mandrel-formed tubes tune exhaust flow for maximum torque- Maximize exhaust extraction- Flanges welded on both sides, then milled flat- Seamless high-velocity collector- Pulls exhaust and slashes backpressure- Exclusive tuned-length parallel 5-tube design- Patented PowerPickle pulse converter- 5/8 inch thick flanges won't warp or flex- Includes Y-pipe and heat shielding