Holley Inc. designs, manufactures, and distributes automotive aftermarket products to car and truck enthusiasts in the United States, Canada, and Europe. Its performance automotive products include carburetors, fuel pumps, fuel injection systems, nitrous oxide injection systems, superchargers, exhaust headers, mufflers, distributors, ignition components, engine tuners, and automotive performance plumbing products; and exhaust products, as well as shifters, converters, transmission kits, transmissions, tuners, and automotive software. The company sells its products under the Holley EFI, Holley, MSD, Simpson, EDGE, Accel, Flowmaster, Cataclean, and other brands through DTC, E-tailer, warehouse distributor, traditional retailer, automotive platforms, and jobber/installer channels. The company was founded in 1903 and is headquartered in Nashville, Tennessee.