Successful with big boost, high pressures, and high RPM
Quality Michigan Motorsports Product
To install the APP billet freeze plugs: Remove your factory side freeze plugs; clean the bore with scotchbrite (make sure there is nothing in the bore that can cut the o-ring). Thread the bolt into the plug retainer 2 full turns and install the plug in the block. Torque to 20ftlb. The freeze plug should go in with hand pressure only.