Custom Big Bore Engine Cases for GY6 150 Long Engine. They are bored to fit up to a 63mm Performance Cylinder Kit. Go big.
Cases are matched Right side and Left side, and stamped with a serial number to make sure you have a perfectly matched set.
Check out the following Cylinder Kits that will work with these cases on a GY6 150 Engine:
57.4mm Cast Iron
59mm Cast Iron
61mm Cast Iron
63mm Cast Iron