Perfect Circle 41940 Piston Ring Set 3.740" Bore Plasma-Moly 8-Cylinder

The Perfect Circle 41940 Mahle Original Precision-Ground Performance Piston Ring Set delivers OE-quality construction and premium materials for reliable engine performance. Manufactured by MAHLE, the world's largest piston ring manufacturer, this standard size ring set features advanced engineering designed for diesel applications.

Key Features:

• 3.740 inch (95.000mm) bore diameter for precise fitment
• Plasma-moly top compression ring (2.3mm thickness) for long service life under severe operating conditions
• Cast iron second compression ring (2.0mm thickness) for optimal sealing
• 3-piece oil ring design with stainless steel expander between two chrome-faced steel rails
• High degree of conformability within the cylinder bore
• Foolproof installation design prevents incorrect ring placement
• Complete 8-cylinder kit includes all rings for one engine
• Pre-gapped rings for convenient installation

Perfect Circle rings are manufactured under strict quality controls with high-strength materials, special ring face contours, and torsional designs that ensure optimum compression sealing and oil control. The plasma-moly facing on the top compression ring provides exceptional wear resistance and scuff protection during break-in. Each ring set meets OEM specifications for fit, form, and function, making them an excellent choice for engine rebuilds and overhauls.