Description
The Wilwood Part Number 170-13970 Big Brake Flared Bell Hat is engineered for high-performance braking systems, crafted from premium aluminum alloys to deliver exceptional strength while minimizing weight. Designed with precision machining, this hat features threaded rotor mount holes compatible with standard through-hole rotors, ensuring reliable and secure attachment. Its versatile design allows the use of T-Nuts or bobbins for dynamic mount rotors with specially machined slotted holes, making it suitable for a wide range of high-demand applications.
These flared bell hats are typically used with rotor bolt circles of 8.38 inches and larger, providing an optimal fit for larger brake rotors. The offsets range from 1.88 inches to 3.00 inches, accommodating rotor diameters of 12.19 inches and above. This flexibility ensures proper clearance and fitment for various custom and aftermarket brake setups. When paired with matched Wilwood rotor hardware kits, these hats offer solid, reliable performance even under the most demanding conditions, making them an ideal choice for racing, off-road, or performance street applications.
Constructed with high precision and quality, the Wilwood Big Brake Flared Bell Hat ensures durability and consistent performance. Its lightweight design contributes to overall vehicle efficiency and handling, while the robust aluminum construction provides resistance to heat and corrosion. This component is an essential part for enthusiasts and professionals seeking to upgrade their braking systems with components that combine reliability, performance, and ease of installation.
Features:
- Constructed from high-strength aluminum alloys for durability and reduced weight
- Threaded rotor mount holes compatible with standard through-hole rotors
- Suitable for use with T-Nuts or bobbins for slotted hole dynamic mount rotors
- Designed for rotor bolt circles of 8.38 inches and larger
- Offsets range from 1.88 inches to 3.00 inches for various rotor sizes
- Compatible with 12-inch and larger brake rotors for versatile application
- Pairs with Wilwood rotor hardware kits for reliable performance
- Precision machined for a perfect fit and consistent performance











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