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MM News

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

Conversion kit from tapered stud to bolt-through spindle
Actual product may differ from photo.


  • Item # MMTR-5
  • Manufacturer: Maximum Motorsports


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Converts tapered-stud style bumpsteer kit to bolt-through spindle style

  • 1979-04 Mustang with MMTR-2, MMTR-4, and MMTR-7 bumpsteer kits
  • Other brands of tapered-stud style bumpsteer kits for 1979-04 Mustangs
  • All Mustang spindles, 1979-04
  • Bolt-through spindle style bumpsteer kit is required when installing MM K-member.
  • No need to purchase an entire new bumpsteer kit: Allows converting a tapered-stud style kit to bolt-through style.
  • Increases the limited adjustment range of a tapered-stud kit to the wide range of adjustment of the bolt-through bumpsteer kit.
  • Exclusive MM spacers are stronger than others, will not buckle when the bolt is tightened.
  • Large assortment of spacers allows precise fine-tuning of bumpsteer.
  • Measurement and adjustment of bumpsteer is required during installation. MM's Bumpsteer Gauge is the right tool for that.
  • Copyrighted installation instructions show you how to measure and adjust bumpsteer.
Product features
  • Includes 2 different lengths of 5/8" Grade 8 bolts to ensure the best length for your Mustang.
  • Spacer bushings were designed specifically for this kit.
  • Longer spacer bushings are made of thick-wall Chro-Moly steel to ensure they will not buckle when the 5/8" bolt is properly tightened.
  • A large variety of spacer thicknesses ensure the ability to properly adjust bumpsteer.
  • Does not include the aluminum adapter sleeves or spherical rod ends.
  • Requires drilling the spindle steering arm to 5/8".