Enginetech M40058-020 Moly Piston Ring Set .020 Oversize 4.000 Bore

The Enginetech M40058-020 is a premium molybdenum-faced piston ring set designed for .020" oversize applications on 8-cylinder engines with a 4.000 inch bore diameter. This high-quality ring set is engineered to meet or exceed original equipment specifications, providing reliable performance for a wide range of American Motors, Buick, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Jeep, Lincoln, Mercury, Oldsmobile, Plymouth, and Pontiac engines.

Key Features:

• 5/64" top compression ring with moly face for superior wear resistance
• 5/64" second compression ring for optimal sealing
• 3/16" oil control ring for effective oil management
• Precision bore size: 4.000" (.020" oversize)
• Ring widths: 0.078" (top), 0.078" (second), 0.188" (oil)
• Complete 8-cylinder set with superior size and weight grading
• Manufactured from high-quality gray iron, ductile iron, and high-strength steel

Enginetech piston rings feature advanced face designs including barrel face, taper face, positive twist, reverse twist, and Napier configurations where required. These molybdenum-faced compression rings deliver exceptional durability and optimal compression for maintaining robust engine performance during rebuilds and overhauls.