MAHLE 51097CP Original Standard Engine Piston Ring Set - Cast Iron, 3.780 in. Bore

The MAHLE Original 51097CP is a standard-size engine piston ring set engineered to OE specifications for 4-cylinder engines with a 3.780-inch bore.

Key Features:

• Cast iron construction delivering high tensile strength, high yield strength, and excellent hardness with low ring mass
• Standard bore size: 3.780 in. — precision-matched to OEM tolerances
• Ring thickness: 2.0mm top compression, 2.0mm second ring, 4.75mm oil ring assembly
• CP-20 oil ring assembly with pre-lapped surfaces for fast seating and virtually no break-in time required
• Low-tension design for reduced friction, improved oil economy, and long service life
• Excellent blow-by control and superior cylinder conformability for dependable compression sealing
• Minimal groove pound-out for extended ring and piston groove life
• Trusted successor to the Perfect Circle brand — MAHLE Original rings have been relied upon by professional technicians for over 100 years

MAHLE is the world's largest manufacturer of piston rings, with extensive OE development experience behind every Original-line product. The 51097CP ring set is an ideal solution for engine rebuilds and overhauls, providing installer-friendly fitment, reduced break-in time, and OE-quality sealing performance right out of the box.