The Caterpillar C13 is an inline-6 diesel internal combustion engine made by Caterpillar. The engine has displacement and cylinders (bore ÃÂ stroke). Engine ratings were available from at 2100 RPM. The peak torque occurs at an engine speed of 1200 RPM.
The engine weighs over one ton at . The Cat C13 is often used in Class 8 trucks and highway coaches. It is also used in large agricultural equipment and fire trucks, where it is rated at a higher horsepower.