Maximum Motorsports Shock, Monotube, solid axle Mustang, 1979-2004, Sport-SP1, Urethane Bushing MMD-RC10SP1-U

Maximum Motorsports
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Third-Generation MM Shocks
MM's third-generation of shocks has several new features to further improve performance even beyond our popular first gen. A decade after MM introduced a line of high-performance monotube dampers, our second generation raises the bar again.


  • Third-Gen MM shocks are black.
  • Second-Gen MM shocks are yellow.
  • Each requires a generation-specific coil-over kit.

Better by Design
MM's Engineering Team created a unique shock with high-end features not found in typical Mustang rear shocks:

  • Oversize shock shaft, 5/8" diameter, for reduced deflection.
  • "Off road"-style shaft seal for increased longevity.
  • Lower eyelet allows either urethane bushing or spherical bearing.
  • Machined groove for coil-over applications.
  • Third-generation valving improves on first-gen performance.
  • Choice of applications; Street, Sport, or Race.
  • Monotube design provides superior damping.
  • Choice of upper mount style to best suit your Mustang's needs.
  • Coil-over ready; simply use appropriate MM Coil-over/Upper Mount Kit.

See the Spring Rate tab for a list of spring rates that each MM shock series will control.

Fits 1979-1985 Mustangs only when upgraded to one of the following:

Coil-over requirement

  • Coil-over installation requires a robust lower shock-to-axle mounting bracket.
  • See the "Options" tab about ordering MM Shock-to-Axle Mounting Brackets.

The choices are confusing. How do I order?

  • Click on the "How to Order" tab for a step-by-step guide to selecting the required items.
  • Click on the "Options" tab for a guide to selecting options that may be required for your installation.

Third-Generation MM Shocks: Better by Design

  • Black powder coat finish
  • MM-designed damping curves for high performance driving
  • Monotube design
  • Nitrogen gas pressure
  • Oversized 5/8" shaft
  • "off road"-style shaft seal
  • Integral cellular foam bumpstop
  • Dust cover for non-coil-over applications
  • Urethane or spherical bearing lower eyelet mount