FLEXIBLE COMP WHISTLE

Features and Benefits:

• Insert the Flexible whistle alert into any spark plug hole and bump the engine until you hear the whistle blow. You are now on the Compression Stroke!
• Easily finds top dead center on compression stroke - quick and easy to use
• Rubber nipple adapts to any spark plug thread size
• Flexible hose allows for reach in tight spaces.
• Made and assembled in U.S.A.