MAHLE 42066CP.030 Engine Piston Ring Set Oversize - 0.030

The MAHLE 42066CP.030 is a complete engine piston ring set designed for use during engine rebuilds where cylinder bores have been bored or honed to a +0.030" (0.76mm) oversize. Manufactured by MAHLE Original, a globally recognized OEM-quality supplier, this ring set is engineered to restore proper compression, oil control, and combustion sealing to worn or rebuilt engines.

MAHLE piston rings are produced to precise tolerances and use high-quality base materials with advanced surface treatments, ensuring long service life and reliable sealing performance in rebuilt engines. This oversize set is intended for use with matched oversized pistons when standard bore dimensions have been exceeded due to wear or machining.

Key Features:

• +0.030" Oversize — designed for use after cylinders have been bored/honed to 0.030" over standard
• OEM-quality materials and tolerances from a trusted global engine components manufacturer
• Engineered for proper compression ring seal, scraper ring function, and oil control
• Surface treatments help reduce break-in time and promote long-term durability
• Complete set includes all rings needed per cylinder (compression and oil control rings)
• Manufactured to meet or exceed original equipment specifications

MAHLE Original is a leading supplier to vehicle manufacturers worldwide, and their aftermarket piston ring sets bring the same engineering standards to engine rebuild applications. The 42066CP.030 is the correct choice when standard-size rings are no longer appropriate due to cylinder bore wear or machining.