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Demco 6271 SMI Air Force One Supplemental Braking System Second Car Kit

*** Second Car Kit - Car Side Only - Replaces SMI 99213

Air Force One is the only air brake system that energizes the towed vehicle's power brakes through a patented process that does not require an electronic vacuum pump. In fact, Air Force One has no moving parts to wear out at all. Air Force One is also the industry's first and only supplemental brake system that protects the coach with a patented breakaway system that seals the coach's air supply in the event of a separation of the coach and the towed vehicle.

Chassis Manufactures agree that the Air Force One is the safest and most secure way of using coach air for supplemental braking. Air Force One is the only system that"does it right" meaning chassis manufacturers will not void any part of your chassis brake warranty.* Air Force One includes components to not only protect the coach brakes in the event of a breakaway, but also to segregate the towed vehicle brake system. This makes our Air Force One the only choice for all chassis manufactures.

Air Force One meets all chassis warranty requirements.

Effective yet Invisible

Air Force One uses a pilot signal from the coach’s air brake system to deliver 100%, direct proportional braking. No inertia (adjustable) system can match this braking profile, period. Just as you don’t adjust the individual braking effort of each wheel on the coach, you don’t adjust the braking effort of Air Force One. The towed vehicle experiences the same perfect braking symmetry as each individual brake on the coach. As such, the exhaust brake and transmission retarder have no effect on the Air Force One. The system is composed of three main components: the Operating Unit, the Actuator and the Coach Air Assembly. The Air Force One Operating Unit mounts under the hood of the towed vehicle, completely out of sight. It houses the vacuum generator for the towed’s power assist and also the reserve air supply for the breakaway circuit. The brake actuator is compact, mounting on the brake arm of the towed vehicle and securing to the firewall with just one self-drilling screw. Once installed, the entire system is invisible and always ready for towing with no set up or take down.

Total Coach Protection

Total Coach Protection, an exclusive Air Force One attribute, is a process that separates and protects the air supply on the coach. To meet federal regulations (FMVSS 121) and chassis warranty requirements when using air brakes, the supplemental brake system must protect the towing vehicle air supply. Only Demco includes the components necessary to meet these important safety regulations. If the towed vehicle separates or the towing system fails, the coach air is protected. Air Force One is the safest air brake system available. No other air-operated system offers this level of safety and control. The Coach Air Assembly is pre-assembled and pre-tested for function and leaks. It’s compact size (approximately 12” x 10” x 6”) and flexible mounting options make securing to the coach with two 3/8” bolts a snap. All fittings are included and are push-to-connect style DOT rated.


For nearly a decade others have tried to copy it, but no one can match the ease of installation, durability and functionality of Demco’s patented actuator. The proprietary design makes binding and cable hang-ups impossible as all the force is completely linear– No Pulleys! Just one self-drilling screw to secure the cable anchor to firewall. Other pulley systems have 6 plus screws and require large, flat surfaces directly behind the brake arm to work reliably– a commodity not afforded by many late model vehicles.

Fits ALL Towed Vehicles!

No need to ask if Air Force One is compatible with your towed vehicle. Air Force One fits all makes and models – from smallest Smart and Fiat to the largest diesel pickup and Hummer H2 and everything in between including hybrids– Air Force One fits them all. Each Air Force One system comes complete with everything necessary for the installation on every towed vehicle. When you purchase a new towed vehicle, the Air Force One system is simply transferred to the new car without purchasing any new parts. A low-cost reinstallation kit is available with small parts for extra convenience outfitting your new vehicle. This convenience comes only from Demco.

Things that are different are not the same.

Air Force One offers the latest in supplemental braking technology. Air Force One uses the coach's air to create vacuum for the towed vehicle’s power-brake feature, and also uses the same air supply to proportionately apply the brakes in the towed vehicle. Since it uses the coach’s air supply, Air Force One does not need an electric pump. In fact, the Air Force One operating unit has no moving parts at all. The Air Force One operating unit is very small and fits under the hood of your towed vehicle. The brake actuator mounts on the brake arm just like the Stay-IN-Play cylinder.

In addition, Air Force One is the only air brake that offers and includes coach protection for the air supply in the event of a separation. With “Total Coach Protection,” the coach’s air supply is sealed off to allow the coach to stop normally. At the same time the coach is protected, the breakaway system on the car activates the towed-vehicle’s brakes.

Air Force One also includes a coach notification light. The notification light is directly linked with the reed switch that is located on the AFO cylinder. Any time the brakes are applied in the towed vehicle, the light is on.

Air Force One is a revolutionary product that will apply truly proportionate brake effort in your towed vehicle. The simple install combined with vacuum-assisted power brakes and truly proportionate braking makes the Air Force One system second to none for a motor home with air brakes.

Combine the power brakes of the car being active with all the other great features, including no set up for towing, and you too will agree with RV’ers all over the country; Air Force One is the greatest new innovation for this industry. Things that are different are not the same. Air Force One is truly better.

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You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


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