MAHLE 3021287 Performance Piston Ring Set Bore - 4.100

The MAHLE 3021287 is a high-performance piston ring set designed for precision engine builds requiring a 4.100-inch bore diameter. This professional-grade ring set features advanced Napier steel construction on the second ring, providing superior wear resistance and oil control in demanding applications.

Key Specifications:

• Bore Size: 4.100 inches
• Ring Width: 1.0mm
• Radial Wall Thickness: 0.136 inches
• Second Ring: Napier steel design for enhanced oil control
• Plain ring set configuration

MAHLE is a leading OEM and aftermarket supplier of piston rings, known for their precision manufacturing and stringent quality control. This ring set is engineered for performance applications where proper ring seal and longevity are critical. The Napier-style second ring features a hooked profile that improves oil scraping efficiency while maintaining excellent cylinder wall conformability.

Ideal for engine rebuilds, performance upgrades, and racing applications where precise bore dimensions and reliable ring seal are essential for maximizing horsepower and engine durability.