GMS, or Granatelli Motorsports, is a company with decades of experience in making a wide array of performance vehicle parts – and, for Jeeps, a series of hitch receivers with built-in winch towers. The 2007-2018 GMS Jeep Wrangler JK parts include receivers with both 3” and 10” winch towers, each with a winch pad on top. These winch pads include holes for bolting on a winch, allowing rear winching for various tasks – recovery, getting a load onto a small trailer more easily, and so on. These, along with the similar receiver and winch towers you’ll find among GMS’s 1997-2006 GMS Jeep Wrangler TJ parts and 1987-1996 GMS Jeep Wrangler YJ parts, are manufactured out of rugged steel. That metal is protected by a tough black powder-coat to keep it from rusting easily. The GMS components on Extreme Terrain are covered by a 90-day warranty against defects.