MAHLE 50620.030 Standard Piston Ring Set Cast Iron 3.875 in. Bore +0.030 V8

The MAHLE 50620.030 is a standard replacement piston ring set engineered for V8 engines with a 3.875 in. bore diameter at a +0.030 in. oversize. Constructed from high-quality cast iron, this set delivers OE-matched form, fit, and function for reliable engine rebuilds and repairs.

Key Features:

• Cast iron construction with high tensile strength, high yield strength, and excellent hardness for long service life
• Upper compression rings feature a positive twist and barrel face design for rapid, consistent break-in
• Second rings provide superior oil control, improved combustion gas management, top ring stability, and effective sealing to minimize power loss
• CP-20 oil control rings utilize an exclusive 20-degree ear angle for optimal side sealing within the piston oil ring groove
• Engineered to reduce friction and ring mass while minimizing engine oil consumption
• Ring thickness: 5/64 in. (top), 3/32 in. (second), 3/16 in. (oil)
• Bore size: 3.875 in. (+0.030 in. oversize)

MAHLE Original piston rings, formerly marketed under the Perfect Circle brand, have been trusted by professional automotive technicians for over 100 years. MAHLE is one of the world's largest OE piston ring manufacturers, and the Original line reflects decades of OE-driven innovation including narrow compression rings, low-tension oil rings, and advanced ring coatings.