Diesel Spec Inc. as a world leader in diesel engine ECM tuning technology. They have built their reputation with countless satisfied customers all over the world.

Diesel Spec has over 300 dealer locations worldwide and it is growing with dealers now in Australia, New Zealand, Mexico, France, Austria, Chili and even South Africa.

Established in 1987 and with over 27 years of experience in heavy duty diesel engines, Diesel Spec is the best choice for all your diesel engine performance needs.

As the ONLY company in North America with technology to eliminate emission systems in agriculture, Diesel Spec is growing its reputation as world a leader in tuning technology.