Description Dualoy Diesel pistons are cast and machined in-house to maintain the highest level of quality and consistency. Available for most popular diesel light and medium-duty truck applications, and engine codes. All Dualoy pistons feature a high strength top ring carrier to improve strength of the top land, and resistance to the extreme heat of diesel engines. Oil cooling galleries are cast into the pistons, as required depending on the specific application. 24V, iron ring insert in top groove. Keystone top ring. DUALOY – Cummins 409CI/6.7L Product Specifications Sold As Piston Set with Rings Engine Manufacturer Dodge Engine Family Cummins Eng. Disp. In. 409 Eng. Disp Liters 6.7 Year Range 2007-2018 Vin Code A, C, L Oe Assembly 4938619 Bore (in) 4.212 Bore (mm) 107 Stroke (in) 4.882 Stroke (mm) 124.0 Oversized STD-.50-.100 Oversize STD Ring Pack 2.87K, 2.5mm, 3.46mm Top Land .315 Pin Number 7201D-GP Pin Type Floating Pin Diameter (in) 1.575 Pin Diameter (mm) 40.0 Compression Height IN 2.734 Compression Height MM 69.45 Crown (cc) 51.4cc Alloy 332 Compression Ratio 17.2
