Derale Heavy Duty Flex Fans

Derale Heavy Duty Flex Fans provide maximum airflow at low RPM when vehicle speeds provide little to no air through the radiator. Vehicle speed offers ample flow at higher RPM so fan blades flatten to minimize engine loading, increasing horsepower and mileage. Fan spacer sold separately.

Features & Benefits

Heavy Duty steel hubs

Durable stainless steel blades

Rated up to 10,000 RPM

Improves performance and mileage

Large surface area pulls more air at low speeds

Reinforced blade construction extends fan life