The Factory Brass Bushings in your Jeep Wrangler JK are known to fail prematurely, promote corrosion and require timely maintenance to remain quiet and functioning. Delrin Bushings on the other hand, are a high strength, low wearing solution that is more durable and longer lasting than Brass, especially in high-use applications. Delrin bushings generally require less maintenance too, whereas Brass bushings will need regular lubrication to prevent noise and wear, whereas Delrin's self-lubricating properties reduce the need for frequent maintenance