Guide Washer 2.750 x 1/8 Splined

The Peterson Fluid Guide Washer 2.750 x 1/8 Splined is a press-fit pulley component engineered to support spline drive pulley systems in high-performance engine applications. This 2.75-inch outer diameter washer functions as a critical guide element that ensures proper alignment and load distribution in belt-driven accessory systems, reducing friction and extending component life in demanding thermal and mechanical environments.

Constructed from aluminum and finished in black anodize, this washer resists corrosion while maintaining the thermal conductivity necessary for engine bay operation. The 1/8-inch thickness and splined design interface directly with Peterson Spline Drive Pulley systems, ensuring a secure press-fit installation that eliminates slippage during high-RPM operation. The anodized surface protects against oxidation in both street and race environments while reducing weight compared to steel alternatives.

This component is essential for engine builders and enthusiasts installing Peterson spline-drive pulley kits on street rods, race cars, and performance engines where reliable accessory drive engagement is non-negotiable. Proper guide washer installation prevents bearing damage and belt misalignment that can compromise alternator, water pump, and power steering function under load. Sold individually, this washer supports single-pulley replacement or system renovation work.

Peterson Fluid specializes in precision pulley systems for performance applications, and their spline-drive technology is recognized in custom engine and hot rod markets for reducing parasitic drag while improving accessory reliability. This guide washer is one of several supporting components available to complete or repair Peterson pulley installations.