2 Sets SPI .040 Over Bore Piston Rings for Polaris 550 F/C Snow 1999-2006 74mm

Piston Rings for Polaris

These two sets of .040 over bore piston rings from SPI are designed for Polaris 550 F/C Snow engines from 1999 to 2006, with a 74mm bore size.

Overview

These .040 over bore piston rings are intended for Polaris 550 F/C Snow engines. The 74mm size allows for a precise fit after cylinder boring. Using these piston rings restores compression and engine performance.

Built For Performance

• Manufactured from high-quality cast iron for durability
• .040 inch oversize compensates for cylinder wear
• Includes two complete sets for a full engine rebuild
• Precisely machined to correct end gap specifications
• Designed to match original ring profile

Fits These Machines

• for Polaris 550 F/C Snow (1999-2006)

On-The-Job Use

• Top-end engine rebuild for snowmobiles
• Restoring compression in a high-mileage engine
• Preparing a bored cylinder for reassembly

Specs At A Glance

Good To Know

Q: Do I need to prepare the cylinder before using these rings? A: Yes, the cylinder must be properly honed or bored to 74mm to match these .040 over rings.

Q: How do I know if I need .040 over rings? A: Measure your cylinder bore; if it exceeds factory limits by .040 inch, these rings are the appropriate oversize.

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