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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

MM Rear Disc Brake Hard Lines, 1986-93 with SN95 calipers
Actual product may differ from photo.


  • Item # MMBK14R
  • Manufacturer: Maximum Motorsports


Brake hardline plumbing kit for 1986-93 Mustang 5.0L with rear disc conversion using 1994-2004 OEM SN95 calipers and rotors. Kit includes stainless steel hard lines and hardware to attach lines to 8.8" axle housing.


This brake line kit will make your life much easier when swapping 1994-2004 Mustang rear brakes onto a Fox Mustang rear axle. The unique stainless steel hard lines in this kit were designed by Maximum Motorsports just for this conversion.

  • Fits features on the 1979-1993 Mustang chassis.
  • These hard lines clear the stock Fox chassis bumpstops, the quad-shock brackets on the 8.8" axle housing, and a rear coil-over conversion.

This kit eliminates the problems caused when trying to reuse drum brake hard lines with a disc conversion, and avoids the interference encountered when using the 1994-95 Mustang axle hard lines on a Fox chassis.

Kit includes

NOT included

Related Products

  • Makes your Fox Mustang rear disc brake conversion easy, clean looking, and safe.
  • Designed to solve the unique fitment issues encountered when swapping rear disc brakes on to a Fox chassis; no need to modify SN95 brake lines to fit.
  • Fits MM's braided stainless steel rear hoses.
  • Stainless steel provides excellent protection against corrosion, for a long service life.
  • Includes hardware to attach to the Fox 8.8" axle housing.


  • 1986-1993 5.0L chassis
  • 1986-1998 8.8" axle housing
  • Ford OEM SN95 (1994-2004) calipers and rotors, Cobra and GT
  • Stock 1986-1995 5.0L Mustang 8.8" axle center brake hose
  • Maximum Motorsports stainless steel braided center hose: MMBK1R
  • Maximum Motorsports stainless steel braided caliper hoses: MMBK12R
Does NOT fit
  • 1994-2004 stock rear caliper rubber hoses


  • To install on 1979-1985 chassis and 1986-1993 non-V8 chassis (originally fitted with a 7.5" axle), modifications to the chassis brake hard line are required to allow fitting a 1986-1995 5.0L center brake hose.
  • All 1979-1993 Mustangs originally fitted with a 7.5" axle had the brake hose to the axle located on the passenger side, rather than the left-of-center location used for the 8.8" equipped 1986-1993 Mustangs.

You can read Maximum Motorsports' highly detailed MMBK14R Brake Line installation instructions before purchase.