By using the AMB cap to create an Anti-Mass Bias (negative mass bias on the back side) it allows the ball to have a lower RG than the original DC core while maintaining a high differential. It also helps maintain more of the core dynamics for most drillings. In the case with most strong Mass bias balls, when drilling the thumb – you remove a large portion of the heavy core or cap used to create the bias, resulting in less of the core’s original dynamics. BUT, with the AMB core, you drill into lighter coverstock and save almost all of the original core shape – retaining the true reaction originally designed by the core.

*** This is a modified version – not the original Centaur core. The bottom arm was lengthened, the densities changed, the top flip cap was made heavier and the ultra-light “AMB” cap was created on the back side. The result is a very high differential core producing high flare (usually 5″ or more). The core produces much backend than the Green/Blue Centaur ***