Drive Kit Spacer Kit

The MOROSO Drive Kit Spacer Kit is a precision engineered crank mandrel spacer assembly designed for engine builders and performance shops performing crankshaft work, pulley alignment, or harmonic balancer installation and removal. This kit provides the essential spacer components needed to safely support and position the crankshaft during critical engine assembly operations. Whether you're rebuilding a high-performance engine or performing routine maintenance, having the correct mandrel spacers ensures proper fit and prevents costly damage to expensive rotating components.

This kit includes three aluminum spacer rings in graduated thicknesses—0.25 inch, 0.375 inch, and 0.5 inch—each engineered to fit a standard 1-inch mandrel with a 1/8-inch keyway for secure, indexed positioning. The natural aluminum construction offers excellent durability while remaining lightweight, making the spacers easy to handle and store. The graduated sizing approach allows technicians to achieve precise spacing requirements across different engine platforms, accommodating varying crankshaft configurations and pulley designs without requiring multiple specialized tools or mandrels.

Engine builders, machine shops, and serious enthusiasts benefit most from this complete spacer kit, as it eliminates the need to source individual spacers or improvise with makeshift shims that could slip or cause misalignment. The 1/8-inch keyway design ensures repeatable, repeatable positioning across multiple installations, critical when working with tight-tolerance components like harmonic balancers or custom-ground cranks. Compact and lightweight at just 0.2 pounds, the kit stores conveniently in any tool chest and works with standard 1-inch mandrel pullers and installation tools used in professional and home shop settings alike.