MCS Adapter Compression Tester 12Mm Lost or broke your screw-on adapter for your compression tester?. - Used between the tubing of a compression tester/leak down tester and the cylinder head - With 5/16" / 8mm sized hose end - Threaded end is 12mm x 1.25 - Fits most 12mm threaded cylinder heads 99-17 Twin Cam / 86-22 XL Sportster / 08-12 XR1200 (NU).
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