Hat No: 170-8920

Call (805) 388-1188
Big Brake Hat - Short Offset
Prod #: 170-8920
Price: $170.58
Big Brake Hat - Short Offset 170-8920

Hat Dimensions
Mount Hole Type Threaded
Rotor Bolt Circle (in) 12 x 9.19
Hat Offset (in) 0.290
Center Reg. (in) 2.78
Hat Type
Material Aluminum
Mount Style Fixed Mount
Finish Black E-Coat
Weight (lbs) 2.100
Bolt Circle Dimensions
Hat Bolt Circle 1 5 x 4.75
Hat Bolt Circle 2
Hat Bolt Circle 3
UPC Number
UPC 889545042702
Application Info
Application Note Corvette C6
Hat Bolt Kit Part # 230-4572
Application Note
Application Note
Big Brake Hat - Short Offset - Product Description

GT Series Big Brake Short Offset hats are precision machined from premium aluminum alloys for high strength and attention to minimized weight. Hats in this category feature threaded rotor mount holes for use with standard through-hole mount rotors. Threaded hole hats may also be used with T-Nuts or bobbins designed for use with specially machined slotted hole dynamic mount rotors. When used in conjunction with matched Wilwood rotor hardware kits, GT hats provide solid, reliable performance in the most demanding conditions. Short Offset Hats are for narrow space applications with offsets often less than 1.00". They are available for most rotor bolt patterns in a variety of four and five lug wheel patterns.


Shallow Offset Hats are for narrow space applications with offsets often less than 1.00". They are available for most rotor bolt patterns in a variety of four and five lug wheel patterns.



Vehicle Applications
Driving Environment Street Rods
Vehicle Sub-Types
Application Duty Heavy Duty
Driving Environment Street Performance
Vehicle Sub-Types Domestic
Application Duty Heavy Duty
Driving Environment Street Performance
Vehicle Sub-Types Import
Application Duty Heavy Duty
Driving Environment Road Race
Vehicle Sub-Types
Application Duty Heavy Duty
Driving Environment Off Road
Vehicle Sub-Types
Application Duty Heavy Duty

Rotor Hat Dimensions

Big Brake Hat - Short Offset Hat Drawing Big Brake Hat - Short Offset Hat Drawing Zoom Image
Additional Hat Dimensions
Rotor Mount Hole Size (in) 1/4-20
Shoe I.D. (in)
Clearance I.D. (in) 8.16
Face Thickness (in) 0.30
Hat Stud Diamenter - BC 1 (in) 0.520
Hat Stud Diamenter - BC 2 (in)
Hat Stud Diamenter - BC 3 (in)
Additional Notes

Wilwood Compatible Rotors

GT 72 Curved Vane Rotor


Rotor Dimensions
Rotor Diameter Range 14.25
Rotor Width Range 1.25

GT 72 Curved Vane Rotor Rotors

Wilwood's GT & GTB 72 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest braking available. GTB rotor have additional black e-coat finish applied for applications where corrosion resistance is concern. View GT Rotors
GT 72 Curved Vane Rotor


Rotor Dimensions
Rotor Diameter Range 14.25
Rotor Width Range 1.25

GT 72 Curved Vane Rotor Rotors

Wilwood's GT & GTB 72 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest braking available. GTB rotor have additional black e-coat finish applied for applications where corrosion resistance is concern. View GT Rotors
GT 72 Curved Vane Rotor


Rotor Dimensions
Rotor Diameter Range 14.00
Rotor Width Range 1.10 - 1.25

GT 72 Curved Vane Rotor Rotors

Wilwood's GT 72 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest braking available. View GT Rotors
SRP Drilled Performance Rotor


Rotor Dimensions
Rotor Diameter Range 14.00 - 14.25
Rotor Width Range 1.10 - 1.25

SRP Drilled Performance Rotor Rotors

SRP Drilled Performance Rotors feature a specially engineered directional cross drill and face slot pattern that improve brake response and pad performance throughout the entire range of light to heavy braking. The venting and cleaning action of the holes and slots will reduce pad glaze and disperse gasses and heat generated during the pad to rotor interface. The holes and slots also inhibit irregular pad compound build-up on the rotor faces resulting in smoother engagement and improved pedal response in all conditions. The material removed also contributes to lower rotating and unsprung suspension weight. View SRP Rotors

 
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Wilwood makes every effort to maintain our web site to ensure the accuracy of prices and product information. However, product information and prices are subject to change without notice. Please call (805) 388-1188 before ordering to verify current prices and product information.
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Version: 3.05 June 23, 2023