A308 Offset Valve Tappet Gauge Set. 1 Engine Brake Feeler Gauge and 1 Offset Valve Tappet Gauge Set features 2-Handles and 11-Blades. 2124332 Engine Brake Feeler Gauge Tool. Compatibility: Specifically designed to replace the part number 2124332, this feeler gauge tool is compatible with Paccar engines.