MAHLE 41904CP.030 Original Premium Engine Piston Ring Set Over - 0.030

The MAHLE Original 41904CP.030 is a premium-grade engine piston ring set sized at 0.030" over standard bore, engineered as a direct OE replacement for Chrysler/Dodge/Jeep 5.7L HEMI V8 engines. As one of the world's largest OE piston ring manufacturers, MAHLE delivers factory-matched form, fit, and function in every set.

Ring Construction & Materials:

• Upper Compression Ring (UCR): Carbon Steel base material with Plasma-Moly facing — 1.5mm axial height, RF-13PF ring type
• Lower Compression Ring (LCR): Cast Iron base material with THG-10 tapered hook groove design — 1.5mm axial height
• Oil Control Ring (OCR): Stainless Steel with Chrome facing — 3.0mm axial height, CP-20 Shallow Groove design
• Premium material grade throughout

Key Features:

• Pre-lapped finish seats immediately, virtually eliminating break-in time
• Barrel-faced compression ring contact area for more efficient cylinder sealing
• CNC-controlled gap chamfer optimizes compression and reduces blow-by
• Intermediate rings feature a reverse twist design for superior groove side sealing
• Exclusive CP-20 oil ring assemblies use a 20-degree ear angle for optimal cylinder wall side sealing
• Special chemical polish on the oil ring expander promotes enhanced oil drain-back
• Ring materials, coatings, and tension optimized to reduce friction and extend service life
• Engineered to minimize engine oil consumption in line with OE specifications

The MAHLE 41904CP.030 is the preferred choice for professional engine builders performing overhaul or rebuild work on applicable 5.7L HEMI-powered vehicles.