Utilizing an 8" (20.3 cm) rigid straight tube, this compression adapter extension provides access to M14-1.25 spark plug holes located in deep or recessed wells. The fixed design allows for easier threading into the cylinder head than a standard flexible hose assembly. This extension integrates with compression testers to facilitate pressure diagnostics on engines with obstructed plug ports.

Utilizing an 8" (20.3 cm) rigid straight tube, this compression adapter extension provides access to M14-1.25 spark plug holes located in deep or recessed wells. The fixed design allows for easier threading into the cylinder head than a standard flexible hose assembly. This extension integrates with compression testers to facilitate pressure diagnostics on engines with obstructed plug ports.