FAQs & Tech Tips

MM News

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

2005-2010 Mustang Road and Track Grip Box
Actual product may differ from photo.
  • 2005-2010 Mustang Road and Track Grip Box
  • Standard included HD control arms
  • Optional upgraded XD control arms
  • Optional added Mm5KM-7
  • Optional Mm5RLCA-57 rear lower control arm brackets
  • Optional MMT-4 Bumpsteer gauge

click on thumbnail to zoom


  • Item # RTB-50

Select Option(s):

Upgrade to XD control arms?




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Maximum Motorsports Road & Track Box for 2005-2010 Mustangs greatly improves handling, pushing cornering power above the 1.2g level, while retaining ride quality suitable for a daily-driven Mustang. For 2011-2014 Mustangs, see the RTB-51 package.

RTB-50 equipped

This package is for the driving enthusiast who demands:

  • Superior handling for their street-driven Mustang.
  • Ride comfort suitable for daily commuting and long trips.
  • The ability to enjoy open-tracking or autocrossing with only a minor compromise in performance compared to a Mustang purpose-built for track use.

The Maximum Motorsports Engineering Team fine-tuned this Grip Box through extensive testing. We used a Motec data acquisition system to log-test both street and track sessions. This gave us the precise information we needed to choose swaybar and spring rates for the best combination of ride quality and track performance.

Included Standard items


To order

Related Products

  • Excellent cornering ability
  • Capable of delivering continuous cornering forces above 1.2g, as tested with Michelin Pilot Super Sport tires (tread wear rating of 300)
  • Improves appearance by lowering approximately 1.8" to 1.9"
  • Reduces body roll
  • Quickens steering response
  • Reduces brake dive
  • Moderate change in ride quality; from OEM-soft to firm, yet not harsh


  • 2005-2010 Mustang

2011-2014 Mustangs need the RTB-51 Road & Track Box