MAHLE 42143.030 Engine Piston Ring Set Oversize - 0.030

The MAHLE 42143.030 is a complete engine piston ring set engineered to OEM specifications for reliable performance and long service life. The .030 designation indicates a +0.030" oversize (0.762mm over standard bore), making this set ideal for engines that have been bored or honed during rebuild to restore proper clearances.

MAHLE is a globally recognized OEM supplier trusted by major engine manufacturers worldwide. Their piston rings are manufactured to strict tolerances using premium materials to ensure optimal compression, reduced oil consumption, and efficient heat transfer between the piston and cylinder wall.

Key Features:

• +0.030" Oversize — designed for cylinders bored 0.030" over standard to restore factory-tight clearances
• OEM-grade materials — high-strength cast iron and/or steel construction with precision coatings for durability
• Complete ring set — includes compression rings and oil control rings for all cylinders
• Precision ground profiles — ensures proper seating, break-in, and long-term seal integrity
• Reduced blow-by — tight manufacturing tolerances minimize combustion gas leakage past the rings
• Optimized oil control — oil ring design limits oil consumption while maintaining adequate lubrication
• MAHLE OEM quality — manufactured to the same standards as original equipment supplied to vehicle manufacturers

Designed for engine rebuilders and professional technicians, the MAHLE 42143.030 piston ring set is the trusted choice when precision and reliability are required. Always verify bore diameter with a quality bore gauge prior to installation to confirm correct oversize fitment.