SPI .040 Over Bore Top End Repair Kit for Polaris 550 F/C 1999-2021 74mm

SPI .040 Over Bore Top End Repair Kit for Polaris

This SPI .040 over bore top end repair kit is designed for Polaris 550 F/C engines from 1999 to 2021, featuring a 74mm bore size.

Overview

This SPI .040 over bore top end repair kit provides all the components needed to rebuild the cylinder head and piston assembly on Polaris 550 F/C engines. It is sized at 74mm bore for a .040 overbore application. Ideal for restoring compression and performance on engines from 1999 through 2021.

Built For Performance

• Includes cylinder, piston, rings, wrist pin, and gaskets
• Forged piston for strength and reliability
• .040 over bore increases displacement slightly
• 74mm bore matches oversize specification
• Direct fit for Polaris 550 F/C engines
• High-temperature resistant gaskets included

Fits These Machines

• for Polaris 550 F/C (1999-2021)

On-The-Job Use

• Engine overhaul on Polaris 550 F/C vehicles
• Restoring lost compression and power
• Repairing worn cylinder and piston
• Racing or performance rebuilds
• Maintaining fleet vehicles

Specs At A Glance

Good To Know

Q: Does this kit include a new cylinder? A: Yes, it includes a new cylinder, piston, rings, wrist pin, and gaskets for a complete top end rebuild.

Q: Is the piston coated? A: The piston features a high-strength forging and may include a skirt coating for reduced friction.

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