New Universal Products Tractor 4" X 48" Straight Pipe W/ ClampOne New Aftermarket Replacement 4" x 48" Straight Exhaust Stack Pipe with Clamp Universal Fit for Tractors and Agricultural Equipment This straight exhaust stack pipe is a universal fit replacement for tractors and agricultural equipment requiring a 4 inch inside diameter, 48 inch vertical exhaust stack. Sold as a complete set including the exhaust clamp, this pipe channels combustion gases away from the engine and operator. It is a direct replacement