Immortal Solid

The AMB-IMMORTAL is the latest adaptation of our highly successful Anti-Mass Bias core design. Unlike other balls which use dense materials to create a mass bias, the AMB design utilizes an extremely light cap opposite the desired mass bias location. This AMB flip cap creates a negative mass bias on the side with the cap and also creates a positive mass bias at the desired location. This allows the bowler to drill the ball in just about any possible manner, without affecting the core shape or dynamics.

Line Immortal
Color Yellow/Black
Coverstock Reactive Solid
Core 2-piece Asymmetrical
RG 2.51
Differential 0.078
Intermediate Diff n/a
Factory finish 1000 grit Matte
Weights 10 thru 16lbs
Cleared USBC Yes


Visionary Immortal Solid Bowling Ball by Willie Willis,