MAHLE 3551MS-15 Performance Piston Ring Set 3.551" Bore 1.5mm 1.5mm 3.0mm Drop-In

The MAHLE 3551MS-15 is a premium performance piston ring set designed for 3.551-inch bore applications, featuring a 1.5mm top ring, 1.5mm second ring, and 3.0mm oil control ring configuration. MAHLE pioneered the use of piston ring simulation and computer development tools to engineer rings that provide "free" horsepower by successfully minimizing friction, with ultra flat ring flanks and precision finish that maximize ring to piston sealing.

Key Features:

• Positive twist ductile iron top ring with barrel-faced profile and plasma-moly inlaid coating for superior wear resistance
• 1.5mm second ring with taper hook groove design for improved combustion gas management and ring stability
• Standard tension 3.0mm three-piece oil control ring assembly for optimal oil management
• Drop-in design for easy installation without filing or fitting required
• Precision-manufactured to 3.551-inch bore specifications

This ring set is designed for performance engine builds where reduced friction, improved sealing, and proven durability make the difference on the dyno and the track. The 1.5mm compression ring widths offer an excellent balance between sealing efficiency and reduced friction compared to traditional ring packages, making this set ideal for both street performance and competition applications.