GSC Race Balance ShaftDon't let removing your balance shafts shorten your oil pump's and engine's life. GSC has a race balance shaft that will go in place of the OEM balance shaft and support the oil pump's operation even at extreme RPMs. The GSC Power Division race balance shaft kit includes: 2 Bearings; to block oil passage to the removed balance shaft Mitsubishi Balance Shaft Delete Cap; to cap off removed balance shaft pulley Mitsubishi Balance Shaft Pulley Delete