This caliper is the preferred choice of GRT, Mastersbilt, & Victory Circle. FNDL calipers are a direct replacement for all previous Wilwood NDL and similar competitive brand calipers with 3.50” centered mounting lugs. A total of five bolts provide superior bridge strength and positive retention of the brake pad. FNDLs are ideal for late models, modifieds, and sprints. Manufactured using high strength yet light lightweight aircraft alloy.