Reducing setup time with an easy-to-turn design for fast thread starting, this 12 mm compression tester adapter accesses deep-seated spark plug holes on 2004 to 2007 Ford 4.6 and 5.4 L, 3-valve Triton V-8 engines. It connects to OTC compression testers or any gauge assembly with a 14 mm thread to facilitate pressure testing in cramped engine compartments. This specialized tool provides the necessary reach and fitment for specific Ford cylinder heads where standard adapters cannot seat.

Reducing setup time with an easy-to-turn design for fast thread starting, this 12 mm compression tester adapter accesses deep-seated spark plug holes on 2004 to 2007 Ford 4.6 and 5.4 L, 3-valve Triton V-8 engines. It connects to OTC compression testers or any gauge assembly with a 14 mm thread to facilitate pressure testing in cramped engine compartments. This specialized tool provides the necessary reach and fitment for specific Ford cylinder heads where standard adapters cannot seat.