Jims Compression Release Tap for Harley-Davidson

10 x 1.0 male.

Used to tap JIMS 978426 Compression Release Valve Set threads.

Note: The 978424 Compression Relief Valve Tool facilitates proper thread tapping on 99-17 Twin Cam cylinder heads.

Fits: Twin Cam > 99-17 (may not fit Twin-Cooled models).