Stomski Cylinder Hold Down Nuts

These specially designed and fabricated nuts secure the 911 cylinders in place during rebuild. The nuts allow for easy crank rotation and installation of pistons/cylinders without having the cylinders slip out of the case. Precisely fabricated from 2011 aluminum and anodized for years of service. Each nut is complete with a special Delrin insert to protect your cylinders. Comes in a set of SIX.