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MFactory Race Pack kits take your B, K, or H-series motor MFactory differential to the next level. These kits include new helical gears, as well as new washers and mounting hardware. Stage 2 also features an upgrade to 28 splines. The kits are designed for more aggressive cornering and raise the torque bias from 66% to 75%
Stage 1 kits will fit B, K, H, and CR-Z/R18 applications.
Stage 2 kits will only fit B or K-Series helical differentials.