MAHLE 50850.030 Original Engine Piston Ring Set +0.030" Oversize

The MAHLE 50850.030 is an Original-line engine piston ring set machined to a +0.030" oversize bore specification, engineered for engines that have been bored or honed beyond the standard bore diameter. MAHLE is the world's largest manufacturer of piston rings, and the Original line draws directly on OE-grade engineering to deliver precision fit, reduced friction, and long service life.

Key Features:

• +0.030" Oversize bore — designed for use in engines that have been bored 0.030" over standard
• OE-driven design — ring materials, coatings, and tensions are optimized to match original equipment specifications
• Pre-lapped finish — rings seat immediately upon installation, virtually eliminating extended break-in time
• Barrel-faced compression rings — promote more efficient cylinder sealing and reduced blow-by
• Reverse-twist intermediate ring — improves groove-side sealing and features taper-race machining for enhanced cylinder wall contact
• High tensile and yield strength — low ring mass contributes to stress resistance, minimal groove pound-out, and extended service life
• Optimized oil control — low-tension oil ring design reduces oil consumption while maintaining effective cylinder wall scraping

MAHLE Original piston ring sets have been trusted by professional engine builders and automotive technicians for over 100 years. The 50850.030 is the correct oversize replacement ring set for engines requiring a +0.030" bore specification, making it an ideal choice for engine rebuilds and overhaul applications.