Wilwood GT Series Big Brake Hat Short Offset Aluminum

The Wilwood GT Series Big Brake Hat in a short offset design is a lightweight aluminum rotor hat (rotor mounting bell) for two-piece, bolt-together brake rotor assemblies. It is part of Wilwood's big brake system line. The hat connects the rotor ring to the wheel hub, so it carries braking torque and holds the rotor in position. It can also be called a rotor hat, rotor bell, or rotor center.

Key Features:

• Aluminum construction: Cuts rotating and unsprung weight compared with a one-piece cast iron rotor.
• Short offset design: Positions the rotor ring closer to the hub mounting face, which suits applications with limited clearance.
• Two-piece rotor system: The rotor ring can be replaced on its own, so you don't have to buy a whole new rotor assembly.
• Compatible with GT Series rotors: Built to pair with Wilwood GT Series directional vane rotor rings in a bolt-together assembly.
• Floating or fixed mounting: Two-piece designs allow for rotor expansion from heat, which helps keep braking consistent under hard use.
• Motorsports engineering: Wilwood developed it from its racing experience for street performance, track day, and competition use.

The GT Series hat is a good choice for builders upgrading to a big brake setup. It combines weight savings, serviceability, and strong Wilwood build quality. Each variant in the line has its own part number, so select the one that matches your application.