Wilwood 140-10471 SL4R REAR KIT 13.00Wilwood 140 10471 SL4R REAR KIT 13. 00 Forged Narrow Superlite 4R four piston calipers are combined with BP 10 compound pads and 13 14 rotors in this group of big brake kits for custom high performance street and show machines. This group of specialized kits for cars, trucks, and SUVs retain full use of the OE parking brake, master cylinder output, and ABS where used. FNSL4R rear kits provide complimentary style and performance with 13 and larger