SKU: MPD86500
MPN: MPD86500
The splined brake adapter 42 spline aluminum black (MPD86500) is a precision outboard rotor mounting solution engineered for high-performance sprint car builds and custom automotive applications. This component bridges the gap between modern hub designs and traditional brake rotor bolt patterns, allowing fabricators and performance enthusiasts to adapt 8 x 7.000 in or 8 x 7.500 in rotor configurations to 42-spline hub interfaces. Whether you're converting a salvage hub assembly or upgrading a vintage platform with contemporary braking hardware, this adapter eliminates the need for custom machining while maintaining structural integrity under sustained thermal and mechanical stress.
Machined from lightweight aluminum and finished in black anodize, the splined brake adapter features a robust 42-spline male interface that locks securely onto compatible MPD sprint hubs with zero runout when properly installed. The anodized coating resists corrosion and provides thermal protection in brake assembly environments, where ambient temperatures and radiant heat from rotors and calipers demand durable finishes. Measuring 8.15 x 8.15 inches across its face with a compact 0.85-inch profile, the adapter's geometry minimizes unsprung weight—critical for sprint car suspension tuning—while the dual rotor bolt pattern compatibility (7.000 in and 7.500 in) accommodates multiple OEM and aftermarket rotor sources without modification or adapter stacking.
Mechanics and fabricators restoring circle-track vehicles, building tube-frame road racers, or converting independent rear suspensions will find the splined brake adapter essential for integrating late-model brake components into custom or vintage chassis platforms. Installation requires proper hub alignment and torque sequencing to ensure even pressure distribution across the spline interface; verify rotor runout after mounting to confirm adapter seating. At 1.6 lbs per unit, weight savings compound across all four corners, making this adapter a practical upgrade for weight-sensitive motorsports builds. Compatible exclusively with 42-spline MPD sprint hubs, confirm your hub's spline count and rotor bolt pattern before ordering to ensure a trouble-free fit.
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