Headquartered in Los Angeles, California, USA. R1 Concepts Drum Brake Hardware Kit --. R1 CONCEPTS DRUM BRAKE HARDWARE KIT. Transform your daily drive using R1 Concepts Drum Brake Hardware Kit. 2018 Wrangler JK (submodel: Rubicon, Sahara, Sport, Sport S, Unlimited Rubicon, Unlimited Sahara, Unlimited Sport, Unlimited Sport S, Unlimited Willys Wheeler) JK Body; Standard Brakes (302mm Front Rotors); Heavy Duty Brakes (332mm Front Rotors).
