S&S Cycle 106-3974 Piston Ring Set 4-1/8" Thin Ring Pack Standard Bore

The S&S Cycle 106-3974 is a standard bore piston ring set designed specifically for 1984-up Harley-Davidson Big Twin engines. This thin ring pack features a 4-1/8" bore size and is engineered for use on S&S emissions-compliant engines.

Key Features:

• 4-1/8 inch bore diameter, standard size
• Thin ring pack design for improved performance
• Specifically designed for S&S emissions engines
• Compatible with 1984 and newer Big Twin models
• Includes complete ring set for one piston
• Manufactured to S&S Cycle's high-quality standards

This ring set provides reliable sealing and durability for engine rebuilds and performance applications. S&S Cycle piston rings are precision-manufactured to ensure proper fit and optimal compression for your Harley-Davidson V-twin engine.