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NASA Racers! MM will support NASA road racers with $1,000 contingency prizes for the American Iron, American Iron Extreme, and Spec Iron at the 2019 National Champions. You must register to be eligible.

New! Read the article Maximum Motorsports Tames Fox & SN95 Mustang Rear Suspensions on FordMuscle.com.

MRT Exhaust! MM now offers premium MRT cat-back exhaust systems for 1996-2004 Mustangs.

New! for Street & Strip Mustangs! Big-bore rear wheel cylinders for 1979-1993 Mustang with 9" drum brakes. Improves braking when running big rear tires and front skinnies, and/or different OEM front brakes.

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'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.