Ford Racing Jounce Bumper

Ford Racing Jounce Bumpers: Factory-Proven Suspension for the Lowered Mustang

When you lower a Mustang, the geometry of the suspension changes — and so does the job your jounce bumpers need to do. Stock bump stops are calibrated for ride height ranges that a set of performance lowering springs will push well beyond. The result, without the right hardware, is a harsh, unpredictable chassis reaction every time the suspension reaches its limits. That's exactly the problem that Ford Racing set out to solve with its purpose-engineered Jounce Bumper kits.

The M-5570 Series: Designed from the GT500 Up

Ford Racing's flagship jounce bumper offering is the M-5570-A Jounce Bumper Kit, developed specifically for 2005–2014 Mustangs running Ford Racing Performance Parts (FRPP) lowering springs. What makes this kit stand out is its pedigree: these Ford Racing jounce stops are the same exact ones found as standard original equipment on the 2012–2014 Shelby GT500 Mustang. Ford's engineers didn't design these from scratch as an afterthought — they validated them at the highest level of Mustang production before making them available to enthusiasts.

These GT500 jounce bumper stops may look like stock ones, but they are much softer and spongier. When the jounce bumpers compress, they release slower than stock to provide a less violent chassis reaction when the vehicle bounces off them. This improves stability and ride comfort when used in conjunction with FRPP lowering springs.

For owners of the sixth-generation Mustang (S550 platform), Ford Racing offers the M-5570-B Jounce Bumper and Hardware Kit. This set of four Ford Racing jounce bumper stops fits all 2015–2026 Mustangs with Ford Racing lowering springs installed, including the V6, EcoBoost, and GT models. These modified production jounce bumpers are designed for lowered vehicles and include installation hardware.

What's in the Kit and Why It Matters

Each Ford Racing Jounce Bumper Kit contains two front jounce stop bumpers and two rear jounce stop bumpers — covering all four corners of the suspension in a single purchase. The unique rubber design is much softer than stock, improving stability and ride comfort while providing a less violent chassis reaction. The kit is designed to work with Ford Racing's lowering springs.

Critically, these kits are also shorter than factory bump stops, which matters on a lowered car. The shorter stops are less likely to be hit during normal driving, and if the suspension does bottom out, the softer material makes the ride far less harsh.

Engineering Backed by Ford Motor Company

Automotive performance has come a long way since Henry Ford raced and defeated motorsports icon Alexander Winton in 1901, and the spirit of innovation responsible for that initial victory remains a driving force behind Ford Performance Parts. Ford Motor Co.'s automotive performance division has firmly established itself as an industry leader by leveraging its motorsports heritage to provide world-class products for enthusiasts and professionals alike. That lineage carries directly into every jounce bumper kit Ford Racing produces — parts that aren't reverse-engineered approximations, but genuine components developed and validated by the same engineers who build Mustang Shelby models from the ground up.

If you're planning a suspension upgrade and want components that work harmoniously together, pairing Ford Racing's jounce bumpers with the brand's compatible spring kits is one of the most straightforward performance investments you can make. Browse the full Ford Racing parts catalog or explore all available Jounce Bumpers to find the right fit for your build.