Double Groove Crankshaft Pulley MO64060 Crank Hubs Controls pump/line pressure from 8-16

Controls pump/line pressure from 8-16 PSI

EFI conversions will require a larger-than-stock return line for proper low pressure control

Universal UP32 Vacuum PumpSuits Holden VE

AF501-08BLK

but the real secret is in the angled side bolts

Double Groove Crankshaft Pulley MO64060 Crank Hubs Controls pump/line pressure from 8-16Double Groove Crankshaft PulleySuit SB Chev With Short W P, 5. 40" O. D With 25% Reduction MO64060 64060 Precision machined from high grade, lightweight aluminium castings Extra deep belt grooves provide added belt retention during rapid changes in engine RPM Small pulley diameter slows fan, water pump, and alternator speed to reduce horsepower robbing drag High RPM water pump operation is improved, reducing impeller speed below cavitation threshold