SKU: ALL 18613
UPC: 848238052619
MPN: ALL18613
The Allstar Performance Reducer Spacers 5/8 to 1/2 x 1/2 Aluminum pair is a precision mechanical component designed to adapt larger-diameter shafts, fasteners, or mounting points down to smaller hub or bore specifications. Manufactured from aluminum, these reducer spacers provide a lightweight, corrosion-resistant solution for engine builds, suspension modifications, and drivetrain assembly where dimensional step-down is required without sacrificing structural integrity.
Each spacer in this pair features a 5/8-inch outer diameter that reduces to a 1/2-inch inner diameter, with a 1/2-inch thickness that ensures proper load distribution and alignment during installation. The aluminum construction delivers the right balance of weight savings and rigidity, making these spacers ideal for performance applications where excess mass is a concern—such as high-RPM engine builds, racing platforms, or lightweight suspension systems. The natural aluminum finish resists oxidation and integrates seamlessly into most mechanical assemblies.
Technicians, engine builders, and fabricators rely on reducer spacers to achieve precise bore matching on pulleys, hubs, wheels, and shaft couplings. This pair is suitable for street performance builds, competition vehicles, and custom mechanical projects where the 5/8-to-1/2-inch diameter transition is required. The dual-pack format covers typical applications that require symmetrical spacer placement on opposing sides of a component.
Allstar Performance is recognized throughout the automotive aftermarket for delivering cost-effective mechanical components that meet the demands of both DIY builders and professional shops. These reducer spacers exemplify that commitment—precision-engineered, lightweight aluminum construction at a competitive price point. Whether you're assembling a custom engine, upgrading suspension geometry, or fabricating a one-off drivetrain solution, these spacers provide the dimensional accuracy needed to ensure proper fit and function.
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