Media Coverage

Johnathan Goodwin can get you 100mpg, cut emissions by 80%, and double the hoursepower.

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Recent News

Goodwin to Attend SEMA Show 2014 NOV 7-10
Las Vegas, NV: The SEMA Show draws the industry’s brightest minds and hottest product… read more

Kansas Man Turns Gas Guzzlers into Green Machines
KAKE TV News  Video Link... Even though hybrid vehicles are gaining … read more

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Diesel Conversions

Eco-Friendly Power - You can now have great fuel mileage, low emissions, and tons of horsepower as developed by the man who started it all! Johnathan Goodwin and his company H-Line Conversions pioneered "The Conversion" of the H1 and H2 Hummers from gasoline, 325 h… read more

Hybrid-Electric Kit

The Patented Goodwin Assist is a revolutionary new technology for converting Hummers into highly fuel efficient plug in hybrids. The Goodwin Assist is focused squarely on bang for the buck proposition of maximizing fuel savings with minimal capital investment resulting in the short… read more