Wilwood Hat-Dynamic BB Front 0.29in Offset 5 x 4.75 - 12 on 8.75in

SKU: WIL170-13170

Brake Rotor Hats

WIL Rotor Hat...

Wilwood

Wilwood Hat-Dynamic BB Front 0.29in Offset 5 x 4.75 - 12 on 8.75in

SKU: WIL170-13170

Brake Rotor Hats

WIL Rotor Hat...

Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.

We accept

Description

Wilwood's new Dynamic Bobbin Mount Hats incorporate a new rotor mounting system that allows the rotors to move independently of the hats as they expand and contract through heat cycles. All thermally generated stress is removed from the rotor attachment points. The rotors stay flatter and run truer. Brake response and pedal feel remain consistent. Pad knock back and rotor drag are eliminated. The hats are no longer distorted by stresses generated by thermal expansion and shrinkage of the rotors. All problems associated with thermal distortion are eliminated.

Part Type

Brake Rotor Hats

Data: v4.2 - Upd: 2026-10-13 21:12:39

Specifications

Product Attributes - UPC: 889545042153
Product Attributes - Brand: Wilwood Disc Brakes
Product Attributes - Quantity: Sold individually.
Product Attributes - Part Type: Brake Rotor Hats
Product Attributes - Product Line: Wilwood Dynamic Bobbin Mount Hats
Product Attributes - Brake Rotor Hat Type: Bobbin
Product Attributes - Brake Rotor Hat Color: Black anodized
Product Attributes - Brake Rotor Hat Material: Aluminum
Product Attributes - Manufacturer's Part Number: 170-13170
Product Attributes - Brake Rotor Hat Bolt Circle: 12 x 8.75 in.
Product Attributes - Brake Rotor Hat Offset (in.): 0.29
Product Attributes - Brake Rotor Hat Clearance I.D. (in.): 6.90
Product Attributes - Brake Rotor Hat Face Thickness (in.): 0.30
Product Attributes - Brake Rotor Hat Center Hole I.D. (in.): 2.78
Product Attributes - Brake Rotor Hat Stud Hole Diameter (in.): 0.52

Reference Information

Brand Name/s	Wilwood
StreetFX SKU	wil170-13170
SFX Item ID	4406585
Supplier Item Code	4406585
Manufacturer SKU	170-13170
Manufacturer UPC	889545042153
Alternative References	0.29in, 8.75in

Compatibility

Application Data

Number of Lugs 5
Bolt Pattern 120.65mm
Application Notes For general big brake applications. Wheel mounting pad must not be larger than 6.00 in. to fit into inset area of this hat.
Number of Lugs 5
Bolt Pattern 4.750 in.
Application Notes For general big brake applications. Wheel mounting pad must not be larger than 6.00 in. to fit into inset area of this hat.