cummins 6cta 8.3 parts 146405-1920 head rotor for 430/450 Diamond Engine

The Cummins marine 6CTA 8.3-M4 480CE engine has had a colorful history to say the least. Back in the early 2000’s Cummins produced the 480C-E “hybrid” version from the 430/450 diamond mechanical engine. By adding an ECM and other improved electronics, boosted the base horsepower from 430 BHP to a whopping 465 BHP all while using the EXACT same block and internal mechanical components. This engine, now suped-up to impress any and every boater in the pleasure boating world was ready to hit the stage. Big boat builders such as Sea-Ray and Tiara to name a few began placing these engines in their boats and propped the boats to impress… and impress they did. However, as boats almost always do, they get heavier, bottoms get dirtier, windage goes up and so on… and the required amount of fuel required to burn to achieve the same RPM increases, which ultimately adds more stress and load to the engines over time.