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New! MM Technical Services: MM’s Engineering Team will provide setup recommendations specifically tailored for your Mustang. Get help choosing options for a Maximum Grip Box, deciding on coil-over spring rates, selecting a brake master cylinder, and advice on converting your Fox to Hydroboost.

New! Swapping a Coyote into a Fox Mustang? MM's Hydroboost Conversion Kits allow easy installation of a 1996-2004 Mustang Hydroboost power brake assist unit into a 1979-1993 Mustang.

New! Swapping an IRS into your Fox Mustang? MM makes it easier with a brake line kit made just for this conversion. Bolts-in, with no cutting or flaring of brake lines. Designed to fit standard IRS brake hoses.

New! MM now offers a tool for the giant nut securing a Mustang Hydroboost. This MM socket fits the 1-7/8" nut holding the Hydroboost to the firewall mount. Required when changing a Hydroboost unit.

New! MM's billet aluminum Pedal Box Spacer for Fox Mustangs. Replace the breakage-prone OEM plastic spacer when converting to manual brakes or Hydroboost.

Canadians! Please read the latest about ordering from Canada/shipping to Canada.

We've posted the parts list and link to the video of MM's Mustang in /DRIVE Tuner car Shootout

Rear Bumpstop, 2005-14 Mustang, pair
Actual product may differ from photo.


  • Item # Mm5BSR-2


Larger Image

Cellular foam high performance short bumpstop for 2005-14 Mustang rear axle. Increases bump travel for lowered S197 Mustangs.

MM's cellular foam bumpstops feature a rapid increase in rate as the suspension bottoms out, cushioning the impact at the end of bump travel before damaging metal-on-metal contact can happen. The short height increases suspension travel, which is very beneficial on lowered Mustangs.

Shorter than stock
This MM bumpstop is 3/4" shorter than the stock bumpstop.

  • Mm5BSR-2 rear bumpstop: 1.5"
  • Stock rear bumpstop: 2.25"

Related Products

  • Front bumpstop kit for 2005-14 Mustang: Mm5BSF-1
  • Package with both front and rear bumpstops: Mm5BSK-10
  • The combination of short height and progressive cushioning improves both ride quality and handling ability.
  • Why is handling improved when bump travel is increased? Lowering a car reduces the available travel when the suspension compresses. If the suspension bottoms hard onto a bumpstop, the effect is the same as if the spring rate skyrocketed. That causes a loss of grip at whichever corner of the car bottomed out.
  • Increasing bump travel lessens the likelihood of the suspension bottoming out. That improves handling, and obviously also improves ride quality.
  • The design of the cellular foam bumpstop provides a progressive cushioning effect. That progressive increase of the bumpstops spring rate eases the jarring effect of bottoming out.


  • 2005-14 Mustang stock rear axle mounting location
  • Cellular foam short rear bumpstop. Quantity: 2
  • Installation Instructions

You can read Maximum Motorsports' highly detailed Mm5BSR-2 installation instructions before purchase.