Our Features


The One and Only EPA-certified System

FLEX-BOX SMART KIT™ is the only aftermarket E85 conversion recognized by the Department of Energy and the Environmental Protection Agency which means you qualify for federal and state incentives and tax credits.

More Horsepower and Torque!

E85 burns cleaner and cooler than gasoline. Plus, with FLEX-BOX SMART KIT™, it boosts horsepower AND torque.

Huge Savings at Pump!

E85 is typically more than a dollar cheaper than gasoline per gallon. That means many more miles per dollar!  

Technical Reviews & Testimonials

The Department of Energy and Oak Ridge National Laboratory completes testing of the Flex Box Smart Kit.  Click Downloads for details.

In the News