MALE & FEMALE CONE Syste m Spacer Kit 31 Spline

The MPD RACING Male & Female Cone System Spacer Kit 31 Spline (SKU MPD87203-31) is a precision axle spacer engineered for midget racing and lightweight competition vehicles. This 0.5-inch thick aluminum spacer features black anodized protection and delivers the exact bearing preload control required for consistent differential performance in high-speed oval track racing. The dual cone design accommodates both male and female cone bearing interfaces, providing versatility across multiple axle configurations without requiring separate kits.

Manufactured to tight tolerances, the 31-spline specification matches standard midget axle internals, ensuring proper fitment and eliminating wobble during acceleration and cornering. The black anodized finish resists corrosion from moisture and track chemicals, extending service life through an entire racing season. At just 0.21 lbs, the spacer adds negligible unsprung weight while maintaining structural rigidity under load. The compact dimensions (3.8 x 1.5 x 4.1 inches) allow seamless integration into existing differential housings without modification.

This kit addresses the critical need for adjustable bearing preload in midget racing, where even slight variations in axle assembly geometry affect handling balance and tire wear patterns. Competitors rebuilding differentials or fine-tuning existing setups can achieve factory-spec preload consistency without guesswork. The cone spacer system is the industry standard for midget and sprint car axle assemblies, making this MPD Racing component a reliable choice for teams requiring OEM-compatible replacement or upgrade hardware.