MAHLE 42143.020 Plain Piston Ring Set +0.020 Oversize 3.1299in Bore

The MAHLE 42143.020 is a premium OE-replacement plain piston ring set designed for the Toyota 1.8L 1ZZFE engine (1998–2006). Manufactured at +0.020" oversize to accommodate bored or worn cylinders, this set is engineered to OE form, fit, and function specifications for dependable sealing and long service life.

MAHLE is one of the largest OE piston ring manufacturers in the world, producing rings driven by the same requirements as original equipment — reducing friction and ring mass while minimizing oil consumption and maximizing durability.

Key Features:

• Bore Diameter: 3.1299 in (at +0.020" oversize)
• Top Ring: Stainless steel with GNS (graphite-nitride) face coating for reduced friction and wear resistance
• Top Ring Axial Height: 0.0469 in
• Second Ring: Cast iron construction with 0.0469 in axial height for superior combustion gas management and top ring stability
• Oil Ring Assembly: Stainless steel CP-20 design with exclusive 20-degree ear angle for optimal side sealing in the oil ring groove
• Ring Style: Plain (non-coated compression ring face profile)
• Oversize: +0.020 in
• Interchange Part Number: 2C4947.020
• UPC: 027067856258

MAHLE Original piston rings are pre-engineered to minimize break-in time and deliver consistent performance from first startup. Whether refreshing a high-mileage engine or completing a full rebuild, the MAHLE 42143.020 provides the precision and reliability demanded by professional engine builders.