The Edelbrock water pump cartridge is for 1997-04 GM LS1/LS6 Gen III. Edelbrock lists equal coolant distribution to both sides of the block within 1%.

Edelbrock water pump.

Edelbrock #8897 Water Pump gm gen iii ls1 & gen iv ls, replacement insert ideal to prevent overheating in street rods and street machines, as well as in tow rigs and motorhomes. Using state-of-the-art racing technology, Edelbrock has designed these "super cooling" Water Pumps to provide maximum flow, maximum pressure and equal distribution to both sides of the block within 1%. The casting's computer-designed internal passages and precision powdered metal impeller produce the maximum flow rate possible.