If you sometimes have trouble getting to the spark plug port for compression testing due to distance or obstructions, then our new Compression Tester Extension may be just what you need. It's a replacement plug adapter with an 8-1/2" reach to work around manifolds, baffiling, harnesses, support structures, and anything else that gets in your way. The T-handle lets you to screw and unscrew the extender into the port without a wrench. And finally, the quick connect coupler makes it as snap to hookup and disconnect your tester.
Note: This extender is for 14MM (Franklin & automotive) engines. Use Eastern 18mm Compression Tester Extension for standard aviation engines. For use with Eastern Technology models E2A and E2M Compression Testers. Click here if you have an ATS Compression Tester. 2 lbs (1Kg) shipping weight.