CL412 4-1/2" Muffler Clamp for TractorsOne New Aftermarket Replacement 4 1 2" Muffler Clamp for Tractors This saddle style U bolt muffler clamp is designed to secure exhaust pipe joints on agricultural tractors and other equipment. It fits 4 1 2" (4. 5") diameter exhaust pipe and provides a secure, leak free connection between muffler and exhaust pipe sections without welding. This is a universal fit part compatible with most tractor makes and models. Specifications Pipe Diameter: 4 1 2"