Reducer Spacers 5/8 to 1/2 x 1-3/4 Alum

The ALLSTAR PERFORMANCE Reducer Spacers 5/8 to 1/2 x 1-3/4 Aluminum (ALL 18619) is a precision spacer pair designed for automotive and racing applications where stepped fastener reduction is required. These aluminum reducer spacers transition from a 5/8-inch outer diameter to a 1/2-inch inner diameter, maintaining a thickness of 1-3/4 inches to accommodate specific bolt and stud configurations.

Constructed from aluminum, these reducer spacers provide a lightweight alternative to steel while ensuring adequate strength for typical automotive fastening tasks. The natural aluminum finish resists corrosion in standard shop and on-vehicle environments, and users can apply painted or coated surfaces for additional protection if desired.

This pair is essential for builders who need to adapt fastener sizes between different component generations or manufacturers. Common applications include engine block modifications, fuel pump mounting blocks, carburetor spacers, transmission mounting, and suspension pickup point adjustments.