BMR BK054 Differential Bushing Lockout Kit for 2015-23 Ford Mustang S550 RWD

Vehicle Fitment

• 2015-2023 Ford Mustang (S550 platform, rear differential, RWD; includes EcoBoost, GT, GT Premium, Bullitt, Shelby GT350, Shelby GT350R, Shelby GT500)

Features

• 6061-T6 CNC-machined billet aluminum lockout plates
• Black anodized corrosion-resistant finish
• Reduces differential bushing deflection under load
• Improves traction and throttle response
• Helps reduce wheel hop and pinion rise
• Simple bolt-on installation using factory mounting points
• Non-permanent upgrade; factory bushing remains installed
• Designed for street and track performance applications

Specifications

• Part Number: BK054
• Material: 6061-T6 billet aluminum
• Finish: Black anodized
• Position: Rear differential bushings (both sides)
• Drivetrain: Rear-Wheel Drive (RWD)
• Platform: S550 Mustang IRS
• Installation time: ~1 hour

Included Components

• 2x billet aluminum lockout plates
• 2x support washers
• 2x CNC formed plates
• 1x hardware pack (bolts & washers)

Product Description

The BMR BK054 Differential Bushing Lockout Kit is engineered to stabilize the rear differential on 2015-2023 Ford Mustang S550 models by eliminating excessive bushing movement. Stock rubber differential bushings can flex under high torque, causing unwanted differential rotation and wheel hop. This lockout kit installs over the factory bushings to restrict movement while maintaining the original bushing for a near-factory ride feel.

Ideal for performance enthusiasts who want improved traction and more consistent power delivery, the BK054 helps reduce pinion rise and wheel hop during hard acceleration. Installation is straightforward and uses existing factory mounting points, making it a quick and effective upgrade for street or track use. Fitment confirmed through 2023; 2024-2025 coverage is unconfirmed at the time of this listing.