1999-04 Mustang Prothane Irs Control Arm Bushing Set Cobra by Prothane

1999-04 Mustang Prothane Irs Control Arm Bushing Set Cobra

Vital additions to any vehicle, these rear upper axle bushing kits help control unwanted wheel hop or shudder.

Item #PT-6311BL
MPN# 6311BL

Everyday Low Price: $59.99

Out of Stock
 This item is returnable. Details

Made in the USA


  • Restores damaged bushings to new condition
  • Improves rear suspension performance


  • Polyurethane Construction
  • Direct replacement for OEM rubber control arm bushings

 What's in the Box

  • (1) set Polyurethane bushings for 99-04 Cobra IRS Control Arms

Prothane IRS Rear Control Arm Bushing Set
From the factory, the Mustang uses rubber bushings in control arms, motor mounts, transmission mounts, sway bars, spring isolators, and struts. Rubber bushings are soft and pliable. They offer great insulation from noise and harshness but cost you in performance and durability. Urethane is a harder, more durable substance. When used in suspension components and drivetrain mounts, they provide increased performance due to the lack of deflection and increased durability and resistance to contaminating fluids such as oil and transmission fluid. Prothane is dedicated to producing the highest quality urethane components on the market today. All of Prothane's products carry a manufacturer's limited lifetime warranty against defects in materials and workmanship. Urethane control arm bushings deflect less for better handling and straight-line traction.

Bushing Lubrication

  • The suspension bushings included with this part can only be lubricated with PTFE grease, also referred to as "Marine Grease". PTFE grease is a very sticky, opaque grease that is water proof and will not degrade the bushing material. If lubed properly at installation, these bushings will not need to be lubricated again. Use of any other grease on these bushings will cause the bushing to fail and any bushing warranty to be voided.

Prothane Warranty - Click Here

  • Ford Mustang - 1999, 2000, 2001, 2002, 2003, 2004
  • Sub Models: Cobra
Fitment Notice 
  • These bushings will replace the upper and lower control arm to subframe bushings only. These are the bushings that are mounted onto the control arm. 
  • This kit will not include the cross-axis bushings mounted on the spindle. 
  • Original bushing shells must be re-used unless otherwise noted.

California Residents:
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About This Brand

Lifted or lowered suspensions, increases in horsepower, plus-size wheels and tires can subject traditional rubber suspension bushings to forces beyond their limits. Control arms, strut arms, leaf springs, body mounts, motor mounts, transmission mounts, sway bars and shocks all control movement and maintain alignment but the rubber bushings they use are designed for more "middle of the road" use. Rubber also deteriorates over time, further reducing control. This contributes to premature component failure, a "spongy" ride and less than ideal performance handling. Urethane bushings can correct these conditions, and improve drivability in your Mustang or Ford Lightning.