SSBC-USA offers you the perfect way to upgrade the performance and the looks of your project car! SSBC-USA Sport R1 single piston conversion kit is not only an incredible performing but an awesome looking alternative to those marginal performing and rusty looking drum brakes! The Sport R1 kits come complete with calipers, mounting brackets and hardware, SSBC-USA slotted and plated rotors (10.5" to 11.5") and braided stainless flex lines. SSBC-USA puts their 34 years of experience in engineering and quality control behind this and every product they sell.