The Forged Billet Dynalite has wide spread application over many forms over motorsports. It serves as the base model in the majority of Wilwood's Bolt-On Disc Brake Kits. The latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. Get a guaranteed taller pedal and better stopping power with these calipers! New forged design for rotors measuring 10" - 13.06" diameter. Includes 4 stainless steel pistons and a 1/8" NPT inlet. Mounting centers are 5-1/4" apart. Pads not included. Catalog Correction: These calipers will work with 10" - 13.06" O.D. rotors.Features: Bridge plates extend the service life of the caliper body and dampens vibrations. High temp seals and stainless steel pistons to eliminate corrosion and retard heat transfer from the pads. Internal fluid passages eliminate the need for external tubes. Four corner bleed screws allow one caliper to be mounted in any front, rear, right, or left position. Black anodized finish to resist corrosion. Wilwood FDL Data Sheet (PDF) Inlet: 1/8 " NPT. Mounting Centers: 5-1/4 " Mount Hole Size: 0.39 " Mount Side: Universal.Features: Bridge plates extend the service life of the caliper body and dampens vibrations. High temp seals and stainless steel pistons to eliminate corrosion and retard heat transfer from the pads. Internal fluid passages eliminate the need for external tubes. Four corner bleed screws allow one caliper to be mounted in any front, rear, right, or left position. Black anodized finish to resist corrosion. Wilwood FDL Data Sheet (PDF) Inlet: 1/8 " NPT. Mounting Centers: 5-1/4 " Mount Hole Size: 0.39 " Mount Side: Universal.