A-160907R1-AI Spring, Exhaust Valve InnerOne New Aftermarket Replacement Inner Exhaust Valve Spring Fits International Harvester (IH) Tractors, Combines, and Industrial Equipment This inner exhaust valve spring is a precision engine valve train component used in the cylinder head of Fits International Harvester D 361, DT 361, D 407, and DT 407 diesel engines. It works in conjunction with the outer exhaust valve spring (160908R1) to control exhaust valve closure and maintain proper valve