FlowKooler High Flow Rate Water Pumps for 1981-90 CJ & Wrangler with 258 6 Cyl or 1983-90 CJ or Wrangler with AMC 150 4 Cyl with Serpentine Belt Drive.

FlowKooler water pumps solve low-speed heating problems by doubling the water flow rate at low RPM and idle. At 3,500 RPM the flow rate returns to normal to prevent too much water flow at high speed.

Independent testing has proven that FlowKooler water pumps produce 20% more gpm at 2000 rpm and 100% more gpm at 900 rpm than any other pump on the market today, including expensive racing pumps. FlowKooler pumps also generate 22% more water pressure inside the engine block than other water pumps. This increased pressure helps suppress engine hot spots, steam pockets and pinging. In addition to higher output, the FlowKooler water pump is up to 32% more efficient than other pumps, meaning less horsepower is required to turn it. All this adds up to engine operating temperature drops of as much as 30 degrees when cruising at low speeds.