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aFe Power's ESD (Electronic Shock Delete) is a simple plug and play module that eliminates the suspension check engine light allowing installation of aftermarket shocks or coilovers on vehicles previously equipped with GM “MagneRide” electronic shock absorbers. A body control module check engine light will limit vehicle speeds to 80mph if not bypassed. This ESD kit is sold in sets of four, one for each shock, and features anodized extruded aluminum heat sinks, GM style Metri-Pack connectors, and abrasion-resistant braided wiring shields.