MAHLE S51476CP Standard Piston Ring Set Cast Iron 4.000 in. Bore V8

The MAHLE S51476CP is a standard piston ring set engineered for V8 engines with a 4.000-inch bore. Manufactured from cast iron to OE-grade specifications, this set delivers reliable compression sealing and oil control for engine overhauls and re-ring jobs.

Key Features:

• Cast iron construction — high tensile strength, high yield strength, and excellent hardness with low ring mass
• Ring dimensions: 5/64 in. top compression / 5/64 in. second ring / 3/16 in. oil ring thickness
• 4.000 in. bore diameter — standard fitment for compatible V8 applications
• Shallow oil ring groove design for proper fitment in matching piston grooves
• 3-piece oil ring assembly with stainless steel expander between two chrome-faced steel rails for superior cylinder wall conformability
• CP-20 oil ring assembly pre-lapped to seat quickly, virtually eliminating break-in time
• Rings are designed to prevent incorrect installation for faster, trouble-free assembly
• Special ring face contours and torsional designs ensure optimum compression sealing and blow-by control

MAHLE is the world's largest manufacturer of piston rings, with deep OE research and development expertise. The S51476CP Original line delivers stress resistance, minimal groove pound-out, long service life, excellent oil economy, and low-friction performance — making it a trusted choice for professional technicians and engine builders performing engine rebuilds or re-rings.