Front Brake Kit – Part No: 140-16666
Call (805) 388-1188
GN4R Big Brake Lug Drive Front Brake Kit (Race)
Prod #: 140-16666
Price: $3,369.85

Front Brake Kit — 140-16666


Kit Contents
Wilwood GN4R Big Brake Lug Drive Front Brake Kit (Race) Parts Laid Out - Type III Anodize Caliper - GT Slotted Rotor Wilwood GN4R Big Brake Lug Drive Front Brake Kit (Race) Parts Laid Out - Type III Anodize Caliper - GT Slotted Rotor Zoom Image



Kit Summary
Spindle Type: Factory Disc Spindle
Mount Type: Radial
Caliper Type: 4 - Type III Anodize
Rotor Diameter: 13.00
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 889545102147

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


GN4R Big Brake Lug Drive Front Brake Kit (Race)

GN4R/ST four piston radial mount race calipers are coupled with the high cooling capacity of 13.00" Dynamic Lug Drive Spec37 GT 48 directional vane rotors to provide the ultimate brake package for road race competition restricted to four piston calipers. GN4R/ST calipers use a forged aluminum body and feature a Type III Mil-Spec, medium gray color hard anodized finish. Hard anodizing provides superior wear resistance in the piston bores, and high resistance to abrasion and corrosion throughout. This latest model of the GN4R/ST calipers features a 20mm thick pads to add volume for longer service life. Thermlock® pistons are used to reduce heat transfer from the pads to increase fade resistance. BP-30 SmartPads selected specifically for exceptional driver control in braking.


Fitment & Installation Details


GN4R Big Brake Lug Drive Front Brake Kit (Race) Assembly Schematic

GN4R Big Brake Lug Drive Front Brake Kit (Race) Assembly Schematic GN4R Big Brake Lug Drive Front Brake Kit (Race) Assembly Schematic Zoom Image


Compatible Vehicles for this Brake Kit
BRAKE KIT:   GN4R Big Brake Lug Drive Front Brake Kit (Race)
SPINDLE TYPE:  
Factory Disc Spindle;
This Brake Kit is Compatible with the Following Vehicle Makes: Ford

Note: Kit may fit other vehicles, call Wilwood Sales⁄Tech Support at (805) 388-1188 for more information.
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Caution
Caution THIS BRAKE KIT HAS A HUB OFFSET OF:
This Hub Offset will move the wheels inward or outward from the fender by this amount on each side of the vehicle
NOTE: Check "Figure 2. Wheel Clearance Diagram" in the installation Instructions below to verify you have adequate wheel clearance for this kit.

Wheel Clearance Assembly Instructions

Wheel Clearance Diagram Wheel Clearance Diagram Zoom Image



Assembly Instructions
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 18" wheels. Check wheel clearance diagram in kit installation instructions before purchase.



Kit Components & Specifications
Calipers
Left Hand - Part No: 120-16529
Right Hand - Part No: 120-16528
Type: GN4R
Finish Color: Type III Anodize
Piston Count: 4
Piston 1 Bore (in): 1.88
Piston 2 Bore (in): 1.75
Piston Area (In²): 5.18
Piston Type: Thermlock
Mount Type: Radial
Brake Pad Plate: 7520
Brake Pad Area (In²): 11.1
Brake Pad Volume (In³): 6.9
Pad Compound: BP-35
GN4R Caliper - Type III Anodize GN4R Caliper - Type III Anodize Zoom Image
Rotors
Left Hand - Part No: 160-16535
Right Hand - Part No: 160-16534
Type: GT 48 Curved Vane
Style: GT Slotted
Surface Finish: Plain
Material: Spec-37 Iron
Outside Diameter (in): 13.00
Width (in): 1.25
Vane Count: 48 CV
Design Type: GT
Bedded: No
Dynamically Balanced: Yes
GT 48 Curved Vane - Spec-37 Iron - Plain GT 48 Curved Vane - Spec-37 Iron - Plain Zoom Image
Rotor Hats
Hat - Part No: 170-16536
Type: Big Brake Dynamic Lug Drive - Short Offset
Material: Aluminum
Finish Color: Type III Anodize
Hat Offset Dimension (in): 0.760
Bolt Circle 1: 5 x 4.50
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 Lug Drive - Short Offset - Aluminum - Type III Anodize Big Brake Dynamic Lug Drive - 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: 130-2427
Replacement Dustboot: N-A
Replacement Piston 1: 200-7550
Replacement Piston 2: 200-7551
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: 300-14218
Wear Plate - Left Hand: 300-5922
Wear Plate - Right Hand: 300-5923
Pad Retainer: N-A
Bleed Screw Kit: 220-0627
Brake Lines
Front Line Kit:
 		220-9111
Hat
Bolt Kit: 300-14912
Hub
Bolt Kit:

Additional related products:




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Version: 3.05 June 23, 2023