Callies Compstar Center Counterweighted LS Crankshaft Reluctor:58x With the ProCharger kit

With the ProCharger kit

NO CORE CHARGE

IDLE BLEED allows adjustment of your idle without affecting throttle position or TPS voltages at idle

This shortblock has a seasoned GM crank paired with forged Callies rods and Diamond pistons

Callies Compstar Center Counterweighted LS Crankshaft Reluctor:58x With the ProCharger kitAt Borowski Race Engines, we like to use fully counterweighted crankshafts in our engine builds. We believe the additional cost of 8 versus 6 counterweights is more than offset by the value delivered in engine longevity and performance. This design increases the stiffness of the crankshaft and reduces harmonics. The direct result is reduced flexing of the crank. The indirect results are greatly improved bearing life and a much stronger bottom end,