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Wilwood Engineering has been the American leader in aftermarket racing brakes since 1977. Forged aluminum calipers, two-piece slotted rotors, and master cylinders engineered for NASCAR, IndyCar, sprint cars, and street-legal big brake kits.
The Wilwood FSLI4 caliper is designed to meet the rigorous demands of high-performance driving and racing. Its key feature, the differential bore piston design, effectively combats pad taper wear by compensating for varying loads and temperatures across the brake pad surface, ensuring consistent and reliable stopping power.
For applications requiring maximum heat resistance, the FSLI4/ST models incorporate Thermlok pistons. These specialized pistons significantly reduce heat transfer from the brake pads to the caliper body, brake fluid, and seals, potentially lowering operating temperatures by up to 25% over standard stainless steel pistons. This makes them indispensable for prolonged high-stress braking scenarios.
Choose the Wilwood FSLI4 caliper for unparalleled braking performance and durability in the most demanding conditions. Upgrade your vehicle with confidence from GGCRACING.
| Brand | Wilwood |
|---|---|
| Manufacturer part number | 120-11138 |
| GGC SKU | WIL120-11138 |
| UPC / GTIN | 889545001341 |
Use the manufacturer part number when you compare with other listings or ask us to confirm a match.
| Box size | 10.95 × 6.25 × 4.88 in |
|---|---|
| Shipping weight | 5.2 lb |
Universal fit — check measurements. Compare the dimensions and specifications on this page with your application before you order.
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