Wilwood FSL4R 4 Piston Radial Mount Brake Caliper

The most noteworthy feature of all the FSL4R caliper models is the exceptional strength and reduced weight of the forging. With the calipers assembled, they weigh just at 4.4 pounds, and the caliper body design in itself is a product of computer generated solid modeling and stress analysis technology. The FSL4R calipers features closed end bridges with a radial transition down to the main body and piston bore housings. The elimination of machined steps and sharp shoulders in this critical area provides a measurable increase in overall body strength and resistance to deflection under load. Every FSL4R body is stress-flow forged from a premium grade aluminum alloy billet.