What is 'lost motion' and how does this kit fix it?

Lost motion refers to excessive play or movement in the rear crossmember. This Whiteline kit inserts into the factory bushing to reduce that extra movement, leading to a more connected and precise feel from the rear of your Mustang.

Do I need to replace my entire factory bushing?

No, this kit is designed to work with your existing factory crossmember bushings. The inserts fill in the gaps to eliminate unwanted movement, rather than requiring a full bushing replacement.

How long will the lubrication last?

The inserts feature internal grease reservoirs for continuous self-lubrication. They are supplied with a special molybdenum disulfide-based grease formulated for extended life and optimal friction management.

Whiteline Plus 14+ Ford Mustang GT500/S550 Crossmember Mount Insert Kit

1 / 3

Specifications

Brand: Whiteline
Part #: KDT943
UPC: 9319924404353

Whiteline Plus 14+ Ford Mustang GT500/S550 Crossmember Mount Insert Kit

Name: Whiteline Plus 14+ Ford Mustang GT500/S550 Crossmember Mount Insert Kit
Brand: Whiteline
Price: 49.88 USD
Availability: InStock

$49.88

Only 6 left in stock

Fits 2015-2025 Ford Mustang. Whiteline Crossmember Mount Insert Kit reduces rear cross member movement for a more positive feel.

Key Features

Fits 2015-2025 Ford Mustang.
Reduces rear cross member misalignment and movement for a more positive feel during cornering.
Made from a synthetic elastomer formulation that resists oil, grease, ozone, and weathering.
Internal grease reservoirs provide continual self-lubrication for friction management.
Includes extreme pressure molybdenum disulfide (LM) based grease for extended life.
Designed to work with the original factory bushing, not replace it.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

Fits this vehicle

Ford Mustang 2015-2025

Product Details

The crossmember mount inserts in this Whiteline kit are made from a synthetic elastomer formulation that resists oil, grease, ozone, and weathering. These aren't a full replacement for your factory bushings, but rather inserts designed to work with them. They eliminate 'lost motion,' which is basically extra movement in the rear crossmember that can make the car feel less precise, especially when cornering hard.

By reducing this misalignment and movement, you'll notice a more direct and positive feel from the rear of your Mustang during spirited driving. The inserts have internal grease reservoirs that provide continuous self-lubrication, and they come with a special molybdenum disulfide-based grease for extended life. Whiteline includes a detailed installation guide, making this a manageable job for a DIYer looking to improve their car's handling.