US Motor Works 31550 Engine Cooling Fan Spacer 2-1/2" Aluminum Belt-Driven Universal

The US Motor Works 31550 is a 2-1/2" belt-driven engine cooling fan spacer designed to properly position a mechanical fan relative to the radiator for optimal airflow and cooling performance. Constructed from high-quality aluminum with a clear anodized finish, this spacer provides a durable, corrosion-resistant solution for a wide range of domestic vehicles.

Key Features:

• Length: 2-1/2" (63.5 mm) spacer thickness
• Material: Aluminum with clear anodized finish
• Male Pilot Diameter: 5/8"
• Female Pilot Diameter: 5/8" or 3/4" — fits most domestic pilot water pumps
• Bolt Size: (4) 5/16"-18 and (4) 5/16"-24 — both fine and coarse thread hardware included
• Flange Bolt Spacing: 1-3/4" to 2-1/4"
• Sold as a complete kit with mounting hardware included
• Designed for standard-rotation, belt-driven fans

This fan spacer is ideal for custom engine builds and cooling system upgrades where the distance between the water pump and radiator requires adjustment for proper fan placement. Note: Fan should maintain a minimum clearance of 3/4" from the radiator, belts, hoses, and pulleys after installation.