Namura .040 Over Bore Piston Rings for Polaris 300 Xplorer Xpress 75.5mm

.040 Over Bore Piston Rings for Polaris

These Namura .040 over bore piston rings for Polaris 300 Xplorer and Xpress are high-performance parts sized at 75.5mm to restore engine compression. These piston rings ensure a tight seal between the piston and cylinder for optimal power delivery.

Overview

The Namura .040 over bore piston rings for Polaris are ideal for engine rebuilds requiring cylinder boring. These piston rings restore the internal seal of the motor to improve combustion efficiency. Choosing these piston rings for Polaris equipment provides a dependable way to return your engine to its intended performance level.

Built For Performance

• Advanced alloy construction for heat tolerance
• Sized for .040 over bore cylinders
• Engineered for consistent ring seal
• Long-lasting durability under load
• Precision machined for gap integrity

Fits These Machines

• for Polaris 300 Xplorer
• for Polaris Xpress

On-The-Job Use

• Full top-end engine overhauls
• Restoration after high-hour wear
• Performance repair for bored engines

Specs At A Glance

Q: What is the benefit of a .040 over bore? A: Boring the cylinder cleans up deep scratches and worn surfaces to provide a fresh, true surface for the piston rings to seal against. Q: Can these be installed on a stock cylinder? A: No, these must be installed on a cylinder that has been specifically machined to the .040 over size.

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