Wilwood 140-16666 GNBig Brake Lug Drive Front Brake Kit

GN4R/ST four piston radial mount race calipers are coupled with the high cooling capacity
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

$3,425.51

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$3,706.84

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Product Summary

Front Position, 13 Inch Rotor Diameter, Anodized, Gray

GN4R/ST four piston radial mount race calipers are coupled with the high cooling capacity
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

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Key Specs

MFG. Part #	140-16666
Position	Front
Wheel Bolt Pattern (in.)	5x4.5 in.
Wheel Bolt Pattern (mm)	5x114.3 mm
Rotor Diameter	13 Inch

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Wilwood 140-16666 Details

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

Specs

Our rotors are machined and fully e-coated, just like the rotor hats. This is a protectant coating the prohibits surface rust from forming on the exposed surfaces. Once the parts are installed and being bedded in, the brake pad friction and caliper pressure will remove the coating at the spot the brake pads touch. This will expose the silver iron material underneath.

Guides & Documents

Disc Brake Kits Installation Instructions (83514016666)

CA Prop 65

Wilwood 140-16666 Specifications

KEY SPECS
MFG. Part #	140-16666
Brand	Wilwood
Position	Front
Wheel Bolt Pattern (in.)	5x4.5 in.
Wheel Bolt Pattern (mm)	5x114.3 mm
Rotor Diameter	13 Inch
Rotor Type	Vented
Caliper Pistons	Six
Caliper Finish	Anodized
Parking Brake Provision	No
Minimum Recommended Wheel Diameter	17 Inch
Rotor Shape	Round
Hardware Included	Yes
Rotor Style	Drilled & Slotted
Front Rotor Included	Yes
Front Rotor Diameter	13.00 in./330.20mm
Front Caliper Included	Yes
Rear Caliper Included	No
Front Spindles Included	No
Master Cylinder Included	No
Brake Booster Included	No
Brake Hoses Included	No
Rear Rotor Included	No
Bolt Pattern	5 on 4.5"
Color	Black
Front Caliper Piston Quantity	Four

GENERAL
Sold in Quantity	Kit
GTIN Code	889545102147
Notes	Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Rotor Thickness	1.25"
Caliper Type	Radial
Rotor Material Type	Spec-37 Iron
Front Rotor Thickness	1.250"
Front Caliper Material	Forged Billet Aluminum
Front Caliper Color	Gray/Silver
Brake Lines Included	Yes
Front Rotor Style	Slotted
Caliper Color	Gray
Caliper Material Type	Forged Aluminum
Front Rotor Construction	Vented

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Fitment

2005-2014 Ford Mustang