The Lightest Weight Mobile Air Compressor Available - UNDERHOOD40 – Truck Series

UNDERHOOD™ 40 Air Compressors – Truck Series


The VMAC UNDERHOOD40 rotary screw air compressor system is the perfect solution for service trucks and operators who use small air tools for light duty applications.

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

Mounting kits available for:


  • Ford F-250 to F-550 Power Stroke Diesel
  • Ford F-250-350 Boss Gas
  • GMC/Chevrolet 2500 to 3500 4.8L Vortec Gas
  • GMC/Chevrolet 2500 to 3500 5.3L Vortec Gas
  • GMC/Chevrolet 2500HD to 3500HD 6.0L Vortec Gas
  • Dodge/RAM 3500 to 5500 6.7L Cummins Diesel

For a complete application list, click here.

Applications – Common jobs that use the UNDERHOOD40 air compressor are:

  • Tire servicing
  • Utility servicing
  • Forklift repair

Commonly used air tools – VMAC UNDERHOOD40 air compressors can be used for:

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


Free up to 23 cubic feet on your truck deck

VMAC UNDERHOOD40 air compressors free up to 23 cubic feet on the truck deck or cargo area because the air compressor mounts in the engine compartment. The only space required on the truck deck or cargo area is 1.7 cubic feet for a combined air/oil cooler and air/oil separator tank.  

Decrease truck GVW by up to 290 lbs 

VMAC UNDERHOOD40 air compressors reduce truck 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 truck, carry more materials, or take advantage of better fuel economy.

Up to 40 CFM. 100% of the time 

VMAC UNDERHOOD40 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. 


VR40 Components



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 62 lbs (28 kg)
Display Box: On/Off controls
  • Combined air/oil cooler, air/oil separator tank
  • 19.75” (l) x 8.0” (w) x 17.5” (h); 44.5 cm (l) x 20.3 cm (w) x 50.2 cm (h)
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.