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Engine Basics is dedicated to understanding car basics including combustion, EFI Tuning basics and electric motors through educational engine articles.

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We are the #1 Dodge Diesel Cummins site on the internet. Please join us for fun, talk and news on your Dodge Cummins Truck.

Bimmerforums is the preferred online community for BMW owners. You will find technical how-to information, maintenance specifics, audio advice, wheel and tire combinations, and model specific details not found anywhere else.

Learn EFI engine tuning via online courses. Each EFI tuning course is broken down into easy to understand videos with a support community and live tuning lessons

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This is a High Powered sited dedicated to Chevy and GMC Duramax Diesel Truck Owners. Welcome!

East Coast Diesel: Performance Truck Parts and Services

MotoIQ is the best source of automotive technical information including engine, suspension tuning, handling, drivetrain, brakes, aerodynamics, road racing, drifting & high performance street cars.

Got a Ford Powerstroke? Riffraff Diesel Performance Parts provides real diesel power with discount Ford 7.3 diesel performance parts and aftermarket parts for your Ford 7.3 powerstroke.