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Description: G- Cast Aluminum Camshaft Holder 50mm stud spacing for 139QMB 64mm or 69mm 2-Valve Set.Specifications:Includes the following Rocker Arm set.•    Cast-Alumin Camshaft Holder Height: 26mm•    Fit 50mm Stud Spacing /Diagonal 70.5mm•    Fit Dowel..

Description: G- Rocker Arm 64mm 2-Valve Set for 50mm stud spacing 139QMB.NOTE: Use a feeler gauge to check the gap and assure a fair gauge grip at 0.004 for the intake-valve-to-tappet and .005 for exhaust-valve-to-tappet. For reassurance please consult your manufacturer cylinder valves adjustme..