Rear Brake Kit – Part No: 140-10638-N
Call (805) 388-1188
Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race)
Prod #: 140-10638-N
Price: $2,234.38

*Line Kit Needed


220-8177
$89.78
*Line Kit Needed


220-9101
$76.95
Rear Brake Kit - Rear Kit


Kit Contents
Wilwood Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) Parts Laid Out - Nickel Plate Caliper - GT Slotted Rotor Wilwood Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) Parts Laid Out - Nickel Plate Caliper - GT Slotted Rotor Zoom Image


View Custom Caliper Colors

Kit Summary
Rear End Axle: OEM
Axle Offset: 0.00
Mount Type: Radial
Caliper Type: 4 - Nickel Plate
Rotor Diameter: 12.88
Min Wheel Diameter Req'd*: 17
*This Brake Kit may fit 17-inch wheels. Please refer to the wheel clearance diagram to check to see if it will fit your specific wheel. Wheel Clearance Diagram
UPC Number
UPC 889545009828

WARNING: Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Applicable to Brake Pads Only


Forged Narrow 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 Aero6 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 provide high efficiency cooling and mount to the drive axles with forged aluminum hats. Kits also include high temperature, high friction race compound pads and all premium grade fasteners.

Watch more videos!
Chevrolet Corvette Rear Disc Brake Install

Fitment & Installation Details

Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) Assembly Schematic

Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) Assembly Schematic Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) Assembly Schematic Zoom Image

Rear End / Axle Housing Flange
Confirm The Configuration!

OEM Flange 		Confirm Offset Measurement!

Axle Flange Cross-Section
Search Rear Kits By Rear End/Axle Offset
caution AXLE OFFSET: 0.00
Check the diagram above and verify this measurement. This kit may be available in several different offsets.
Please call Wilwood with any questions: (805) 388-1188

Wheel Clearance Assembly Instructions

Wheel Clearance Diagram Wheel Clearance Diagram Zoom Image
Part 1
Notes
1. Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
2. Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.



Compatible Vehicles for this Brake Kit

BRAKE KIT:   Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race)

This Brake Kit is Compatible with the Following Vehicle Makes:   Cadillac Chevrolet Factory Five Racing

Note: Kit may fit other vehicles, call Wilwood Sales⁄Tech Support at (805) 388-1188 for more information.

REAR END:   OEM - Rear Kit

AXLE OFFSET:   0.00

For a Complete Listing including ALL Makes, Models and Years, Please click on the Axle Offset.
fitment 1
Offset: 0.00


Kit Components & Specifications
Calipers
Left Hand - Part No: 120-12602-N
Right Hand - Part No: 120-12602-N
Type: Forged Narrow Superlite 4R
Finish Color: Nickel Plate
Piston Count: 4
Piston 1 Bore (in): 1.25
Piston 2 Bore (in): 1.25
Piston Area (In²): 2.46
Piston Type: Thermlock
Mount Type: Radial
Brake Pad Plate: 7416
Brake Pad Area (In²): 8.2
Brake Pad Volume (In³): 3.8
Pad Compound: BP-30
Forged Narrow Superlite 4R Caliper - Nickel Plate Forged Narrow Superlite 4R Caliper - Nickel Plate Zoom Image
Rotors
Left Hand - Part No: 160-13357-GTB
Right Hand - Part No: 160-13356-GTB
Type: GT 48 Curved Vane
Style: GT Slotted
Surface Finish: Black Electro Coat
Material: Spec-37 Iron
Outside Diameter (in): 12.88
Width (in): 1.00
Vane Count: 48 CV
Design Type: GT-BLK
Bedded: No
Dynamically Balanced: Yes
GT 48 Curved Vane - Spec-37 Iron - Black Electro Coat GT 48 Curved Vane - Spec-37 Iron - Black Electro Coat Zoom Image
Rotor Hats
Hat - Part No: 170-12985
Type: Big Brake Dynamic Hat - Short Offset
Material: Aluminum
Finish Color: Type III Anodize
Hat Offset Dimension (in): 0.703
Bolt Circle 1: 5 x 4.75
Bolt Circle 2:
Bolt Circle 3:
Stud Diameter - BC 1: 0.520
Stud Diameter - BC 2: 0.000
Stud Diameter - BC 3: 0.000
Big Brake Dynamic Hat - Short Offset - Aluminum - Type III Anodize Big Brake Dynamic Hat - Short Offset - Aluminum - Type III Anodize Zoom Image
Hubs
Hub - Part No:
Type:
Material:
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
Caliper Parts
O-ring Kit: 130-2479
Replacement Dustboot: N-A
Replacement Piston 1: 200-11343
Replacement Piston 2: 200-11343
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: 230-17553
Wear Plate - Left Hand: 300-6596
Wear Plate - Right Hand: 300-6595
Pad Retainer: N-A
Bleed Screw Kit: 220-0627
Brake Lines
Front Line Kit:
 Front Line Kit:
 		220-8177
 220-9101
Hat
Bolt Kit: 230-6656
Hub
Bolt Kit:
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Version: 3.05 June 23, 2023