
The piston is available with 16.5:1 C.R. and a 3.0 mm top piston ring featuring the company’s proprietary coating designed to reduce high heat scuffing and provide added break-in protection. A manganese phosphate coating on the piston crown helps improve break-in performance, provide added corrosion resistance and reduce pin bore scuffing, the company says.
AFA says it also has piston kits, in-frame and complete overhaul kits for DD Series 50 8.5-liter and DD Series 60 11.1-liter and 12.7-liter engine families.
![Image[73]](https://img.truckpartsandservice.com/mindful/rr/workspaces/default/uploads/2026/02/image73.3mOLWA71AK.png?auto=format%2Ccompress&fit=crop&h=112&q=70&w=112)










