MAHLE 42256CP Engine Piston Ring Set Standard Bore Chrome

The MAHLE 42256CP is a premium engine piston ring set engineered for the Mazda 2.3L (2255cc) KJ engine. Manufactured to OE standards, this chrome ring set delivers the precision fit and durability required for a reliable engine rebuild or overhaul.

MAHLE is a globally recognized OE supplier, and their piston rings are built to the same exacting specifications as factory components. The 42256CP set features a shallow groove ring design and utilizes a multi-ring configuration including an upper compression ring (UCR), lower compression ring (LCR), and an oil control ring (OCR) assembly.

Ring Configuration & Materials:

• Upper Compression Ring (UCR): Ductile iron construction, type RF-18U — chrome-faced for superior wear resistance and sealing
• Lower Compression Ring (LCR): Type THG-18 tapered hook groove design for superior oil control and combustion gas management
• Oil Control Ring (OCR): CP-20 assembly featuring a 20-degree ear angle for optimal side sealing against the cylinder wall, with chemically polished expander for enhanced oil drainback

Key Features:

• Chrome ring set in standard bore size (see oversize variants .020 and .030 for re-bored applications)
• Shallow groove ring type for precise piston fitment
• OE-quality materials and tolerances for long service life
• Reduces friction and ring mass while minimizing engine oil consumption
• Engineered to meet or exceed original equipment specifications

The MAHLE 42256CP piston ring set is the trusted choice for engine builders and technicians seeking factory-level quality in a replacement or rebuild application.