The nature of this superior material, ENERGY SUSPENSION's HYPER-FLEX , is the result of twenty plus years of experience working with and formulating polyurethane materials. Careful selection of material firmness or durometer is used for each specific application on the vehicle's suspension and frame. Simply put the three most valuable reasons for using ENERGY SUSPENSION's HYPER-FLEX ? components are: PERFORMANCE, DURABILITY and APPEARANCE. Called "HYPERformance", ENERGY SUSPENSION's HYPER-FLEX ? is performance polyurethane that delivers an amazing amount of PERFORMANCE to any vehicle that runs with it. Proven on the race track as well as the street, on and off-road, under the most demanding conditions. Over twenty years of positive customer raves have attested to that! Whether domestic or import, front, rear or 4WD, or old or new, all vehicles will achieve that level of performance that has made ENERGY SUSPENSION the most asked-for name in performance polyurethane suspension components. DURABLE HYPER-FLEX ? components do not rot or deteriorate from exposure to oils and undercar chemicals or aospheric conditions like smog and ozone. Unlike O. E. M. rubber, HYPER-FLEX ? components will not break down and deteriorate causing mushy handling and poor steering response. Certainly not what you want on your vehicle! and for improved APPEARANCE, HYPER-FLEX ? components are available in red or black, to suit your needs for show or go.Pit Stop USA offers Energy Suspension Rack & Pinion Bushing Set - Black - 1976-88 Ford Mustang, Pinto, Granada 4-10102G at low everyday prices. Be sure to check out all of our products from Energy Suspension including Energy Suspension Rack and Pinion Bushings.