Competition Cams 623-16 Machined Steel Race Locks， 7 degree Lock Angle for 8mm Valve Stem Diameter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Machined steel single groove for GM Gen III/IV applications</li><li>7 degree lock angle， 8 mm valve stem diameter</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31UQZ7cv4eL.jpg" noproxy>