answersLogoWhite

0

The "red top" refers to the red valve covers, used on N14 Cummins engines, factory set at 460 or more horsepower. It was used to indicate a "high horsepower" engine. Lower horsepower engines had black valve covers. In the later 1990s, the 435 horsepower settings also got red ones.

User Avatar

Wiki User

17y ago

What else can I help you with?