Part Number 66830

High Output Dual 11" Electric RAD Fan/Aluminum Shroud w/ Built-in PWM Controller - 22-1/2"W x 19"H x 4-1/2"D


Get complete control of your engine temperature! Derale Performance has integrated their high performing shrouded Powerpacks with the ultimate fan controller.  Using high output electric fans incorporated into an engineered shroud, this Powerpack can conquer even the most difficult cooling conditions.  This unit features an aluminum shroud measuring 22 1/2" wide by 19" top to bottom and is only 4 1/2" in overall depth to offer an adjustable yet precision fit. The natural, non-finished aluminum shroud gives the user the freedom to polish, anodize, paint, or simply leave it raw to create a truly custom look for an affordable price. The Dual IP-68 certified waterproof/dustproof 11" electric fans provide a powerful one-two 3750 cfm punch to a hot engine. This dual electric fan assembly generates the most real-world airflow in the smallest package on the market.

Now add the integrated PWM Fan Controller with built-in soft start technology.  The controller utilizes Pulse Width Modulation to constantly adjust electric fan speeds from 0-100%, maintaining the optimal engine operating temperature. No more reacting to the engine temps, you can control it! This allows electric fans to operate at the percentage needed, instead of 100% all the time, therefore increasing component life and eliminating amperage spikes.

  • Designed for primary cooling
  • Raw aluminum shroud construction can be polished, painted or anodized
  • High output IP-68 certified waterproof/dustproof motors
  • 3750 CFM
  • Multiple mounting options
  • Puller (engine side) applications only
  • Air pressure relief vents
  • Kit includes adjustable mounting brackets and complete mounting hardware

Built-in PWM Controller Features

  • Pulse Width Modulation controls fan(s) speed from 0-100%
  • Constantly adjusts fans speed to maintain the desired temperature
  • Controls multiple electric fans up to 65 amp capacity
  • Includes automatic resetting circuit breaker
  • Air Conditioning override circuit built-in


    Integrated PWM Controller

      Temperature Sensor Tech Tips

    Demonstration of - PWM Controller running a Dual Shrouded Electric Fan.

  • CFM fan 1/2: 1875/1875
  • Amp draw fan 1/2: 18.7/18.7
  • Width: 22-1/2"
  • Shroud Height: 19"
  • Overall Height: 19-13/16" (with PWM fan Controller)
  • Shroud Depth: 2-3/4"
  • Overall Depth 4-1/2"
  • Mounting: Adjustable

 Built-in PWM Controller Specifications

  • Amp Rating: 65 amp
  • Mounted to Shroud
  • Adds 13/16" to assembly height