| Type | Compression Tester Adapter |
|---|---|
| Country of Origin | United States |
Check the listing for details. 6” M14 to M12 Compression Tester Adapter – Billet Aluminum – USA Made. Condition: New, Made in United States. Listed at 15.99 USD. It features an M12 x 1.25 male thread on the engine side and an M14 x 1.25 thread on the tester side, allowing you to use a standard M14 compression tester on engines equipped with M12 spark plug threads.