Intake Valve Intake valves open and close to allow fuel-air mixture to flow into cylinders Attributes: Cat parts are manufactured to precise specifications and are built for durability, reliability, productivity, less environmental impact, and reuse. SPECIFICATIONS Height (in): 2.1 Length (in): 8.1 COMPATIBLE MODELS Engine - Generator Set G3412C G3412 G3406 CG137-12 Engine - Industrial G3412 G3408 CG137-08 G3408C G3406 G3408B CG137-12