Clevite 40451.040 Premium Piston Ring Set Bore Oversize - 4.040 040

The Clevite MAHLE 40451.040 Premium Piston Ring Set is an OE-quality replacement ring set designed for small block Ford 289/302/351/400, Chevy 327/350, and Chrysler 360 engines with a 4.040" bore diameter (+.040" oversize). Manufactured by MAHLE, a trusted name in engine components, this ring set delivers reliable performance for rebuilt and performance engines.

Key Features:

• 4.040" bore diameter (+.040" oversize) for professionally rebuilt engines
• Upper compression ring: Ductile iron construction with plasma-moly facing for superior wear resistance
• Lower compression ring: Cast iron material with 1.5mm axial height
• Oil control ring: Stainless steel with chrome facing and 3.0mm axial height
• Premium ring types: BR-18PF top ring, THG-10 second ring, CP-20 oil ring
• Meets or exceeds OEM specifications for fit and performance
• Compatible with multiple small block applications across Ford, Chevy, and Chrysler platforms

This premium ring set features advanced materials and coatings designed to reduce friction, minimize blow-by, and maximize compression seal. The plasma-moly top ring coating provides excellent scuff resistance during break-in and long-term durability. Ideal for engine rebuilders and performance enthusiasts seeking reliable, OE-quality piston rings for oversized bore applications.