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This Hefley X2 has all the features as the X1 but it also will adjust to a wide variety of fuels. It has adjustable compression ratio built in.

It can run on regular or high test gas, E85 ethanol, diesel, bio-diesel and other fuels still under development.

All was top secret

For years we have been determined to make a completely new and  highly efficient engine. We new made designs, analyzed, made models, prototypes. There has been no news from us because we were never completely satisfied.

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