The Flex Box allows you to operate your vehicle on any combination of ethanol and gasoline such as E85 (85% ethanol, 15% gasoline), E-20, E-10 or pure gasoline.

EPA-Certified Kits are also available for Dodge and Chrysler passenger car and light truck models equipped with 5.7L Hemi motors, including Charger, Magnum, Chrysler 300, Dodge Ram and Durango. Fleet customers, please call (773) 763-7900 for details.

The Flex Box Smart Kit is available right now for Ford passenger car and light truck models equipped with 4.6L and 5.4L motors, including Crown Victoria, Lincoln Town Car, Mustang, F150, Navigator and Expedition.
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07 - 05 Dodge Magnum, 5.7L V-8, Flex Box Smart Kit

Flex Fuel's Flex Box for the 2007 - 2005 Dodge Magnum, 5.7L V-8, Flex Box Smart Kit
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4.6L V-8, Flex Box Smart Kit

Flex Fuel's Flex Box for vehicles with 4.6LV-8 engines including Lincoln Continental (2002-1997), Lincoln Town Car (2007-1997), Ford Crown Victoria (2007-1996), Ford Econoline E-150 1/2 Ton (2007-1997), Ford Econoline E-250 3/4 Ton, Ford Expedition (2004-1996), Ford Explorer (2004-2007), Ford F-150 3/4 Ton Pickup (2007-1997), Mercury Grand Marquis (2007-1997), Mercury Mountaineer (2007-2004), Mustang V-8 w SOHC (2004-1997)