Earl's Water Pump Spacer - 1/8" NPT Port - Gaskets/Hardware Included - Aluminum - Black - Big Block Chevy - GM LS-Series Harmonic Balancer The 4759 features a 1

The 4759 features a 1

They are compatible with all grades of gasoline

Lightweight Composite Shell

Elements sold separately

Earl's Water Pump Spacer - 1/8" NPT Port - Gaskets/Hardware Included - Aluminum - Black - Big Block Chevy - GM LS-Series Harmonic Balancer The 4759 features a 1Engine Coolant Thermostat Housing (2) 12 AN O Ring Female Ports (Outlet on Each Side of the Block) Black Anodized Finish 1 8" NPT Female Ports For Easy Connection of Steam Tube Plumbing Includes Gaskets & Mounting Hardware Use AN Plumbing for the Coolant Return to the Radiator Ideal for Use w Most Electric Water Pumps for Big Block Chevy Recommended for Use w the Following Water Pumps: Frostbite #'s (22 113, 22 114, 22 126, 22 133, 22 134), or Mr