1689 1955-1963 Chevy 235 Inline 6 water pump galaxie 500 Unlike internal bypass passages found

Unlike internal bypass passages found in older blocks the Vortec blocks and heads do not have the internal bypass passages so the the coolant bypass is an external hose connection from the water pump to the intake manifold

5L w/o AC Oldsmobile Vista Cruiser 1970 V8 455 7

0L gmc c25/c2500 suburban 99-96 V8 350 5

GMC Truck (with AC) applications

7L buick century 1977 V8 403 6

1689 1955-1963 Chevy 235 Inline 6 water pump galaxie 500 Unlike internal bypass passages foundThe tri fives can run hot so Flowkooler designed a high flow water pump with a CNC machined billet impeller to increased vane count and a reduced casting to impeller vane clearance. It achieves greater flow rates, higher head pressure and a more efficient flow. The impeller color is due to Type II Class II military grade surface coating which protects against corrosive fluids. FlowKooler introduced the first hi flow pumps for the inline 6 and