7C4273 Inner Valve Spring Fits Caterpillar Industrial Construction ModelsOne New Aftermarket Replacement Inner Valve Spring Fits Caterpillar (Fits CAT) 3100 Series and C7 Industrial & Construction Engines This aftermarket replacement inner valve spring fits the cylinder head valve train on Fits Caterpillar (Fits CAT) 3114, 3116, 3126, and C7 diesel engines. Used in both intake and exhaust valve assemblies, the inner spring works in conjunction with the outer spring to maintain consistent valve seating pressure, control