MAHLE 51615CP Original Standard Engine Piston Ring Set 3.622 in. Bore

The MAHLE 51615CP Original Standard Engine Piston Ring Set is a premium OE-replacement ring set engineered to deliver original equipment form, fit, and function. Designed for GM 3.4L engines, this set features a standard bore size of 3.622 inches and is built to MAHLE's exacting OE manufacturing standards — making it one of the most technically advanced replacement piston ring sets available.

Key Features:

• OE Form, Fit & Function: Engineered as a direct drop-in replacement with OE-equivalent specifications
• Cast Iron Top Compression Ring: Features a positive twist and barrel face for instantaneous break-in and superior sealing
• 1.500 mm Top Ring Thickness for precise groove fit and consistent compression sealing
• 4.000 mm Oil Ring Width for optimized oil control in the piston oil ring groove
• CP-20 Oil Ring Assembly: Utilizes MAHLE's exclusive 20-degree ear angle for superior side sealing and simplified installation — pre-lapped to seat quickly and virtually eliminate break-in time
• SAE 9254 High-Alloy Steel Napier Second Ring: Provides superior oil control, improved combustion gas management, top ring stability, and reduced power loss
• Designed to reduce friction and ring mass while minimizing engine oil consumption for extended service life

MAHLE is one of the world's largest OE piston ring manufacturers, supplying more than 100,000 OE and aftermarket parts globally. The 51615CP ring set reflects that legacy of quality, offering engine builders and technicians a reliable, long-lasting solution for engine rebuilds and overhauls.