9N5495 Inner Valve Spring Fits Caterpillar Industrial Construction ModelsOne New Aftermarket Replacement Inner Valve Spring Fits Caterpillar (Fits CAT) 3208 Engine This cylinder head inner valve spring is a direct replacement for the Fits Caterpillar (Fits CAT) 3208 engine valve train assembly. The inner spring works in conjunction with the outer valve spring to control intake and exhaust valve operation, maintaining proper valve seating and timing across the full RPM range. The Fits CAT 3208 is a V8 diesel engine used