Redline Tuning 21-11013-02 Hatch Struts Support Shocks (Black) Replacement for Ford Mustang Hatch 1979-1993 Simple one-handed operation, simply start to lift the hatch back and it will raise to the stock height unassisted in a smooth and controlled motion. Redline Tuning is the leader in aftermarket hood QuickLIFT systems, selling our systems worldwide since 2002. Redline Tuning progressive-rate gas springs are not off the shelf parts, they are designed by us and manufactured to our specifications for each vehicle application. Our exclusive end-of-force dampening slows the rate of extension over the final inches of travel eliminating stress to the hood. Quick and simple installation - we design and manufacture all components in our QuickLIFT systems, including our documentation. Full color installation manual will arrive with QuickLIFT system, enabling anyone through this simple installation - our customer comes first. (All Black System) Redline Tuning's 21-11013-02 Hatch replacement struts are designed to work with stock hatches compatible for Ford Mustang. If you have a fiberglass hatch, please contact us as we have lower force gas springs made for this application as well.