Wiseco 3875VM 4-Cycle Piston Ring Set 3.875" Bore 1.2x1.2x2.0mm

The Wiseco 3875VM is a 4-cycle piston ring set designed for a 3.875-inch (98.43mm) cylinder bore. This ring set features a 1.2mm top compression ring, 1.2mm second compression ring, and a 2.0mm oil control ring, providing the precise ring pack geometry required for proper combustion sealing and oil management on performance 4-stroke engines.

Key Features:

• Bore Size: 3.875 inches (98.43mm)
• Ring Configuration: 1.2mm x 1.2mm x 2.0mm (top compression / second compression / oil control)
• Application: 4-cycle (4-stroke) engines
• Set Coverage: One complete ring set services one piston
• Manufactured exclusively to Wiseco's exacting specifications for superior performance and sealing
• Engineered and tested for race-ready performance across compression, sealing, and oil control functions
• Designed to fit Wiseco pistons only — not compatible with OEM or other aftermarket pistons

Wiseco ring sets are purpose-built to complement Wiseco's forged piston lineup, ensuring optimal fit, cylinder sealing, and long-term durability in high-performance powersports and automotive applications. Each set contains rings for a single piston.