Wilwood Billet Narrow Mount Dynalite (NDL) Calipers combine the lightweight, high-torque performance of their Dynalite Calipers with extra thick .63" (16mm) pads that "bridge" bolt directly to standard Superlite 3.5" mounts. Compact and ideal for limited clearance applications, these calipers start at a weight of 3.5 pounds. Their computer-generated billet design incorporates internal fluid crossover passages to eliminate external tubes. Standard Wilwood features include deep cup stainless steel pistons, high-temperature piston seals, and black anodized finish. Recommended for many racing applications: Late Model, Modified, Sprint, Off-Road, and Road Racers.