SSP-G 2mm cylinder spacer for GY6 Engines. Available in A-Case 54mm (76mm diagonal)  Cylinder stud spacing. Cylinder spacers are used to increase piston to valve clearance when using a stroker crank.

A-Case engines are standard GY6 engines with 54mm (or 76mm diagonal) cylinder stud spacing.

B-Case engines are “big block” GY6 engines with 57mm (or 80.5mm diagonal) cylinder stud spacing.

Please Note: You will need an additional cylinder base gasket when installing this spacer.