In 1987 the Series 60 ®--the four-cycle heavy-duty engine that would become the signature of the company--was introduced as the first production engine to have integrated electronic controls as a standard feature.
The Series 60 ®--the four-cycle heavy-duty engine--was introduced as the first production engine. This was in 1987. This was to have integrated electronic controls as a standard feature. This duty engine would become the signature of the company.