Rugged Ridge has a full line of cold-air intake kits to cover two decades of Jeep Wranglers, from YJ to JK. The kits feed cooler air to the engine and come with a polished aluminum intake tube, oil-free cone filter, heat shield, and throttle-body spacer (where applicable). Fuel economy can improve as much as 10 percent, and claimed power gains are as high as 10 horsepower and 12 pound-feet of torque. The unhindered intake system should also generate a distinct suction note.
The only Wrangler engine not currently supported is the YJ’s pre-1991 4.2-liter inline-six.