Installation is approximately 10 minutes per wheel. No drilling, no grinding, no tape or adhesive, no paint, no cleaning and no messy prep work. All you need is a jack, lug wrench, 3/8"wrench and you'll be ready to roll in less than an hour. Required clearance between wheel and caliper of 1/8 of an inch minimum (equal to the thickness of two quarters). Please verify clearance before submitting your order.