Clevite 41786.020 Plasma-Moly Piston Ring Set Bore Oversize - 4.020 020

The Clevite 41786.020 is a premium plasma-moly piston ring set engineered for Chevrolet Vortec 4.3L V6 engines with a 4.020" bore diameter, representing a .020" oversize for rebuilt or bored engine blocks. As part of the MAHLE Original product line, these piston rings deliver OE-quality performance with advanced plasma-moly coating technology that reduces friction, minimizes oil consumption, and extends service life.

Key Features:

• Plasma-molybdenum coating on compression rings for superior wear resistance and reduced friction
• Chrome-plated oil control ring for enhanced durability
• Precision-engineered for 4.020" bore diameter (+.020" oversize)
• Upper compression ring (top ring): 5/64" axial height, RF-13PF profile
• Lower compression ring (second ring): 5/64" axial height, RBT-10 profile
• Oil control ring (bottom ring): 3/16" axial height, CP-20 profile
• Designed for shallow oil ring groove applications
• OE-level quality from one of the largest piston ring manufacturers worldwide

Clevite MAHLE piston rings are manufactured to original equipment specifications and incorporate the latest ring technology to meet modern engine demands. The plasma-moly coating provides exceptional scuff resistance during break-in and reduces ring mass while maintaining optimal sealing characteristics. This ring set is ideal for engine rebuilds requiring oversize rings due to cylinder boring operations.