Wilwood 140-18075 Forged Narrow Superlite 4R Big Brake Rear Brake Kit For OE Parking Brake 13.5 Black - USA-WIL-140-18075 - Forged Narrow Superlite 4R Big Brake Rear Brake Kit For OE Parking Brake Forged Narrow Superlite 4R four piston calipers are combined with BP-series 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 SUV’s 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 front brake upgrades in conjunction with wheel, tire, and suspension upgrades. Optional caliper finishes and rotor designs enable the builder to match style and performance on all applications. Kit Summary Rear End Axle: OEM Axle Offset: 0.00 Mount Type: Radial Caliper Type: 4 - Black Powder Coat Rotor Diameter: 13.50 Min Wheel Diameter Req'd*: 17 Kit Components & Specifications Calipers Left Hand - Part No: 120-14055-BK Right Hand - Part No: 120-14055-BK Type: Forged Narrow Superlite 4R Finish Color: Black Powder Coat Piston Count: 4 Piston 1 Bore (in): 1.38 Piston 2 Bore (in): 1.38 Piston Area (In²): 3.00 Piston Type: Stainless Mount Type: Radial Brake Pad Plate: 7416 Brake Pad Area (In²): 8.2 Brake Pad Volume (In³): 3.8 Pad Compound: BP-22 Rotors Left Hand - Part No: 160-16668-GTB Right Hand - Part No: 160-16668-GTB Type: GT 36 Straight Vane Style: GT Slotted Surface Finish: Black Electro Coat Material: Iron Outside Diameter (in): 13.50 Width (in): 0.81 Vane Count: 36 V Design Type: GT-BLK Burnished: No Dynamically Balanced: Yes Rotor Hats Hat - Part No: 170-13958 Type: Parking Brake Hat - Standard Material: Iron Finish Color: Black E-Coat Hat Offset Dimension (in): 2.200 Bolt Circle 1: 5 x 5.00 Bolt Circle 2:   Bolt Circle 3:   Stud Diameter - BC 1: 0.000 Stud Diameter - BC 2: 0.000 Stud Diameter - BC 3: 0.000