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Wilwood Forged Superlite 4R Big Brake Rear Brake Kit (Race) – Nickel Plate Caliper – GT Slotted Rotor


Forged Superlite 4R Big Brake Rear Brake Kit (Race)

Forged Narrow Superlite 4R-QS caliper rear road race kits provide matched performance in conjunction with FSL6R and W6AR front race kits on vehicles built specifically for competition. FNSL4R-QS calipers use high temperature, fluid resistant high gloss “Quick-Silver” finish, stainless steel pistons to retard heat transfer from the pads and high temperature seals for reliability in sustained high heat. Radial mount brackets attach the caliper in the stock location. GT series directional vane competition rotors are dynamically mounted to forged aluminum hats. Kits also include high temperature, high friction race compound pads and all premium grade fasteners.

SKU: 136151


Kit Summary

Rear End Axle: OEM
Axle Offset: 0
Spindle Type:
Mount Type: Radial
Caliper Type: 4 – Nickel Plate
Rotor Diameter: 14
Spindle Type:
Min Wheel Diameter Req’d*: 18

Fitment & Installation Details

Rear End / Axle Housing Flange:
Confirm The Configuration! Confirm Offset Measurement!

Kit Components & Specifications

Calipers: Info / Part Number:
Left Hand – Part No: 120-13575-N
Right Hand – Part No: 120-13575-N
Type: Forged Superlite 4R
Finish Color: Nickel Plate
Piston Count: 4
Piston Area (In²): 2.46
Piston Type: Thermlock
Mount Type: Radial
Brake Pad Plate: 7420
Brake Pad Area (In²): 8.2
Brake Pad Volume (In³): 4.9
Pad Compound: PolyMatrix H
Forged Superlite 4R Caliper - Nickel Plate
Rotors: Info / Part Number:
Left Hand – Part No: 160-12884
Right Hand – Part No: 160-12884
Type: GT 36 Straight Vane
Style: GT Slotted
Surface Finish: Plain
Material: Iron
Outside Diameter (in): 14
Width (in): 0.81
Vane Count: 36 V
Design Type: GT
Bedded: No
Dynamically Balanced: Yes
GT 36 Straight Vane - Iron - Plain
Rotor Hats: Info / Part Number:
Hat – Part No: 170-14430
Type: GT Dynamic Mount Hat – Flared Bell
Material: Aluminum
Finish Color: Type III Anodize
Hat Offset Dimension (in): 1.2
Bolt Circle 1: 5 X 4.50
Bolt Circle 2:
Bolt Circle 3:
Stud Diameter – BC 1: 0.63
Stud Diameter – BC 2: 0
Stud Diameter – BC 3: 0
GT Dynamic Mount Hat - Flared Bell - Aluminum - Type III Anodize
Hubs: Info / Part Number:
Hub – Part No:
Finish Color:
Mount Style:
Bolt Circle 1:
Bolt Circle 2:
Bolt Circle 3:
Stud Diameter – BC 1:
Stud Diameter – BC 2:
Stud Diameter – BC 3:

Parts & Accessories

Calipers: Info / Part Number:
O-ring Kit: 130-2479
Replacement Dustboot: N-A
Replacement Piston 1: 200-7555
Replacement Piston 2: 200-7555
Replacement Piston 3: N-A
Replacement Piston 4: N-A
CrossOver O-Ring Kit: 130-10540
Crossover Tube: N-A
Self-Bleeder Tube: N-A
Bridge Bolt Kit: 230-5976
Wear Plate – Left Hand: 300-5923
Wear Plate – Right Hand: 300-5922
Pad Retainer: N-A
Bleed Screw Kit: 220-0627
Brake Line Kits: Info / Part Number:
2016 Ford Mustang
Hat: Info / Part Number:
Bolt Kit: 230-6656
Hubs: Info / Part Number:
Bolt Kit:


Additional information



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Model Year

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