Product Overview

The Cummins OEM Articulated Piston Assembly (3966721 crown / 4941393 skirt) features a sophisticated two-piece design that separates the high-temperature crown from the skirt for independent expansion. This innovative construction reduces thermal stress, improves oil cooling, and minimizes piston scuffing while lowering overall weight for better engine efficiency.

Volgen Power supplies genuine Cummins OEM pistons, ensuring precise tolerances, premium materials, and proven performance that restores compression, power, and fuel economy during engine rebuilds.

Design & Durability Advantages

• Advanced Heat Management — Gallery-cooled crown efficiently dissipates combustion heat for reduced thermal fatigue
• Reduced Friction & Weight — Separate skirt allows optimized clearances and lighter construction for lower inertial loads
• Enhanced Ring Support — Precision-machined grooves ensure stable ring seating and superior oil control
• High-Strength Materials — Forged steel crown and aluminum skirt resist cracking and wear in high-boost conditions
• Direct OEM Replacement — Exact fit with factory pin, rings, and liners for straightforward installation

Engine & Application Compatibility

Fully compatible with Cummins engines:

• QSL9 (all Tier 3/4 interim ratings)
• QSC8.3 (select configurations)
• Related industrial and marine variants

Common in construction equipment, agricultural tractors, wheel loaders, excavators, and generator sets.

Technical Specifications

Volgen Power stocks genuine Cummins OEM articulated pistons for QSL9 engines, ready for worldwide shipping.

Rebuild your QSL9 with factory-precision pistons for maximum reliability – contact us today for pricing, availability, or complete overhaul kits. Get your quote now!