The Only Air Compressor Specifically Engineered For Commercial Vans – Underhood™ 40 – Van Series

UNDERHOOD™ 40 Air Compressors – Van Series


The UNDERHOOD™ 40 rotary screw air compressor system is the only solution for commercial vans and operators who use small air tools for light duty applications, and is the only air compressor that solves common safety issues found with traditional air compressors in vans.
UNDERHOOD™40 Air Compressor

Van Mounting Kits

VMAC engineers van mounting kits for the easiest possible installation. Working closely with leading van manufacturers, VMAC ensures that mounting kits do not affect OEM warranties.

Mounting Kits available for:

freightliner-logo mercedes-benz-logo
  • Mercedes-Benz Sprinter V6 Diesel
  • Freightliner Sprinter V6 Diesel
  • Ford Transit V6 Gas™
  • GMC Savana V8 Gas

For a complete application list, click here.

Applications – Common jobs that use the UNDERHOOD™ 40 air compressor are:

  • Tire servicing
  • Utility servicing
  • Forklift repair

Commonly used air tools – UNDERHOOD™ 40 air compressors can be used for:

  • 3/4“ impact wrench
  • Light chipping hammers
  • Die grinders
  • Tire inflation


Free up to 10 cubic feet in your cargo area

UNDERHOOD™ 40 air compressors free up to 10 cubic feet in the cargo area because the air compressor mounts in the engine compartment. The only space required in the cargo area is 1.7 cubic feet for a combined air/oil cooler and air/oil separator tank.

Reduce vehicle GVW by up to 290 lbs 

UNDERHOOD™ 40 air compressors reduce van GVW by as much as 290 lbs. Choosing a lightweight air compressor means you’ll be able to add more tools and equipment to your van, carry more materials, or take advantage of better fuel economy.

Up to 40 CFM. 100% of the time 

UNDERHOOD™ 40 air compressors use patented rotary screw technology designed to run at 100% duty cycle without stopping, so operators don’t have to wait for their air compressor to fill up a large air receiver tank.

Eliminate common safety issues

UNDERHOOD™ 40 – Van Series air compressor are the only 40 CFM air compressors specifically engineered to eliminate safety hazards that van operators face including lifting injuries, toxic fume exposure and gas fires inside the cargo area.



The UNDERHOOD™ 40 compressor mounts under the hood of your van. To operate, simply shift your van into park and engage the parking brake. With the engine idling, a simple on/off switch turns on the compressor system. Once on, an electric clutch engages on the compressor, the engine idles up, and the rotary screw compressor delivers a steady, continuous flow of air to your tools.

The WHASP Tank is an integrated cooler/tank that mounts in the cargo area on your van. An air/oil mixture is thrust from the compressor to the WHASP Tank that both cools the air/oil mixture, and separates and then recirculates the oil back to the compressor. The compressed air flows continuously to our auxiliary air receiver tank and onto your air tools.

Throttle control must have two speed operation (base and elevated idle) and must automatically modulate engine RPM depending on air usage.


Air Compressor Output: Up to 40 CFM @ 100 psi (150 psi max)
Air Compressor Type: Belt-driven, 100% duty cycle, VMAC oil-injected rotary screw
Total System Weight (wet): Approximately 85 lbs (38.5 kg)
  • Combined air/oil cooler, air/oil separator tank
  • 19.75” (l) x 8” (w) x 17.5” (h) ; 44.5 cm (l) x 20.3 cm (w) x 50.2 cm (h)
Throttle Control: Two-speed operation; automatically modulates engine RPM depending on air usage; adjustable
Display Box: On/Off controls
Safety System:
  • Electro-magnetic clutch
  • Compressor thermal protection circuit
  • Automatic rapid blow-down valve on tank
  • 200 psi pressure relief valve
Air Receiver Tank (recommended, not included): Minimum 6-Gallon Air Receiver Tank - Recommended for best performance.
Warranty: Two years on all major components; VMAC air-ends are covered by VMAC’s Lifetime Limited Warranty; for details, visit

*Actual maximum CFM output of the air compressor varies by vehicle application. See Application List for details.