Wilwood 140-4503-BD FDL Front Drag Brake Kit for 1984-1993 Mustang/T-Bird

Vehicle Fitment

• 1984-1986 Ford Mustang SVO (5-lug & disc brakes)
• 1987-1993 Ford Mustang (V-8 spindle, 5-lug wheel hubs)
• 1987-1993 Ford Thunderbird Turbo Coupe (5-lug wheel hubs)

Features

• Forged Dynalite FDL 4-piston front calipers for improved stopping power
• 10.75" drilled solid steel rotors for reliable drag application braking
• Forged billet 5-lug hubs with direct-mount rotor design for weight savings
• Gray Type III anodized caliper finish for corrosion resistance
• Includes new hardware, wheel bearings, seals, and extended lug studs
• Designed for use on cars up to ~2,800 lbs with rear discs or ~2,400 lbs with rear drums
• Drilled rotor surface improves heat dispersion under repeated use
• Average weight reduction of over 30 lbs compared to stock drum or disc brakes

Specifications

• Part Number: 140-4503-BD
• Position: Front axle
• Caliper Type: Forged Dynalite FDL, 4-piston
• Caliper Finish: Type III anodized gray
• Rotor Diameter: 10.75"
• Rotor Type: Solid steel, drilled surface
• Wheel Bolt Pattern: Dual 5x4.50" / 5x4.75"
• Minimum Wheel Diameter: Typically 15" required
• Hub Offset: +0.49" shirt from fender relative to stock
• Brake Lines Included: No (line kit required separately)

Included Components

• 2x Forged Dynalite FDL front brake calipers (left/right)
• 2x 10.75" drilled solid rotors with hubs
• Wheel bearings and seals
• Extended length lug studs and installation hardware

Product Description

The Wilwood 140-4503-BD FDL Front Drag Brake Kit is a purpose-built drag brake upgrade designed for classic Mustang and Thunderbird vehicles from the mid-1980s through the early-1990s. Featuring forged Dynalite four-piston calipers and drilled 10.75" solid rotors mounted to forged billet hubs, this kit offers improved braking performance and drag launch stability while significantly reducing unsprung weight compared to older drum or disc systems. It's ideal for drag racers and performance enthusiasts looking for reliable stopping power in a lightweight package.

Installation uses direct bolt-on brackets to the factory disc spindles on V-8 Mustangs and Turbo Coupe Thunderbirds equipped with 5-lug hubs. Included hardware such as bearings, seals, and extended studs simplifies assembly, though a separate brake line kit is needed to finish the plumbing. Designed for vehicles weighing up to ~2,800 lbs with four-wheel disc brakes (or ~2,400 lbs with drum rear brakes), this kit typically works with 15" and larger wheels to provide adequate caliper clearance.