If you're running big tires, lockers, or just pushing your Jeep JK/JKU harder than stock, PSC offers two serious upgrades for your steering system: the Cylinder Assist® Steering Gear and the Replacement Gear. Both are engineered for 2007–2018 Jeep Wrangler JK/JKU models and built to handle the demands of off-road abuse and oversized tires. The Cylinder Assist® Gear is the strongest, most capable bolt-on gear available, designed for those planning to run a full assist system. The Replacement Gear is a heavy-duty, non-assist option for drivers who want improved steering performance without adding hydraulic assist.