3937VMF Ring Set 3.937in for Wiseco Pistons

Ring Set for Wiseco

This Wiseco 3937VMF ring set is a 3.937in. piston ring set made to seal the combustion chamber and control oil on high-performance pistons.

Overview

The Wiseco ring set is a piston ring set sized for a 3.937in. bore. This ring set restores compression sealing and oil control on a fresh top end. It suits engine builders and riders working on high-output applications.

Built For Performance

• Precision-ground ring faces for consistent sealing
• Sold as a complete set for one piston
• 3.937in. bore size machined to tight tolerances
• Designed to match Wiseco piston ring grooves
• Heat-treated material for high-rpm durability

Specs At A Glance

Good To Know

Q: How many rings come in this set? A: This is a piston ring set for one piston, so it includes the rings needed for a single cylinder. Confirm the count against your piston before ordering.

Q: Does ring end gap need adjustment? A: Ring end gaps should always be checked and filed to the piston maker's spec during assembly. Skipping that step can cost compression or damage the cylinder.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.