Wilwood 170-8357 Big Brake Hat Short Offset 0.550 - USA-WIL-170-8357 - Big Brake Hat - Short Offset 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. Hat Dimensions Mount Hole Type Threaded Rotor Bolt Circle (in) 12 x 8.75 Hat Offset (in) 0.550 Center Reg. (in) 3.06 Hat Type Material Aluminum Mount Style Fixed Mount Finish Black E-Coat Weight (lbs) 2.000 Bolt Circle Dimensions Hat Bolt Circle 1 4 x 3.93 Application Info Application Note Scion Hat Bolt Kit Part # 230-4572