Proudly Built in the USA! Heavy Duty Bolt on 4" pipe with MR400 series muffler that replaces the factory muffler. This will increase the flow and volume of the exhaust. This exhaust has a Deep Aggressive Rumble. This muffler replacement does not require any cutting or welding to install. It gives a great performance sound that is deep, mean, and aggressive. Volume 7 out of 10. Fits all 2014-2020 Ram Hemi 6.4L 2500 Pickup trucks with the factory exhaust. This entire exhaust system is built from heavy duty Stainless Steel right down to the hangers and Welding. Direct fit and will clamp right to the factory tailpipe. No Welding! It will fit all bed and cab sizes as long as you have the 6.4L Hemi engine.