Dynamite Friction 631-54015L Disc Brake Rotor - Front Left

Drilled and Slotted Front Left Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver, part number 631-54015L, is a vented front left disc brake rotor built for specific Ford and Mercury applications. It combines a slotted X drilled surface with a zinc silver hat finish and rust resistant coating for a clean, service-ready appearance.

Compatible With 1978-1993 Ford Mustang, 1978-1983 Ford Fairmont, 1980-1986 Ford LTD, 1980-1988 Ford Thunderbird, 1979-1986 Mercury Capri, 1978-1988 Mercury Zephyr, 1980-1988 Mercury Cougar, and 1983-1986 Mercury Marquis front left applications. The 631-54015L rotor is also listed for multiple police, taxi, heavy duty, and rear drum configuration notes within those model ranges.

Key Features

• Part number 631-54015L from Dynamite Friction
• Front left disc brake rotor for select Ford and Mercury vehicles
• Vented rotor construction
• Slotted X drilled braking surface
• Zinc silver hat finish with rust resistant coating
• Outside diameter: 256 mm
• Nominal thickness: 22.2 mm
• Discard thickness: 20.6 mm
• 4-bolt pattern with 108 mm bolt circle diameter
• 63.8 mm center hole diameter

Product Details

This DFC Brake Rotor - Drilled and Slotted - Silver is built around the fitment and dimensions needed for older Ford Mustang, Thunderbird, Fairmont, LTD, and Mercury platform vehicles. The directional, slotted X drilled braking surface is specified for the front left position, while the vented design supports consistent brake service on the listed applications. The silver zinc hat finish and rust resistant coating add corrosion protection where exposed rotor surfaces are a concern.

For shoppers searching long-tail terms such as front left drilled and slotted brake rotor for 1983-1993 Ford Mustang or 1980s Mercury Cougar vented disc brake rotor, 631-54015L provides a direct fitment reference. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Uses

• Replacing a worn front left rotor on a compatible Ford Mustang or Mercury Capri
• Addressing brake pulsation from rotor wear or uneven surface condition
• Restoring braking performance on vented front disc brake systems
• Replacing a rotor with corrosion on the hat or braking surface
• Servicing vehicles with the listed rear drum and production-date notes

Installation Notes

Verify the vehicle year, make, model, and front left position before ordering. Confirm rotor dimensions, 4-lug bolt pattern, 108 mm bolt circle, and 63.8 mm center hole diameter against the existing brake setup. Review the fitment notes carefully for production date, police package, taxi, heavy duty, and rear drum configuration details on Ford Thunderbird, Mercury Zephyr, and related applications.

Because this rotor is directional, install it on the correct side and orientation as specified for the front left position. Always inspect pads, caliper condition, and hub surfaces during brake service to ensure proper rotor seating.

Quality Assurance

Dynamite Friction supplies this rotor as a dimension-specific brake component for the listed Ford and Mercury applications. The zinc silver finish and rust resistant coating support long-term surface protection in normal brake service conditions.