Universal Fit Tractor 4-1/2" X 24" Straight Pipe w/ ClampOne New Aftermarket Replacement Straight Exhaust Pipe with Clamp for Universal Tractor Makes and Models This straight exhaust stack pipe is a universal fit replacement designed to channel exhaust gases away from the engine on a wide variety of agricultural tractors. The 4 1 2" inside diameter and 24" overall length make it a common replacement size for larger tractors across many brands. A clamp is included for a secure, leak free connection at