Our goal with this kit was to create XK-150 front disc brakes for the XK-120 and XK-140 -- not to create the monster kit with six-pot calipers gripping rotors the size of a medium pizza. The photo tells the story, but this is the most complete kit in the industry, with all the required hardware included, not to mention new splined hubs, rotors, disc brake cylinders, hoses, etc., etc. For single or dual master cylinder, but wire wheel cars only. This kit includes our proprietary braided stainless steel brake lines. They eliminate the need to modify the front brake pipes and make the kit totally bolt-on or bolt-off should you wish to convert back to drums. We also include a braided rear line. Bring some stopping power to your XK-120 or XK-140! This kit will not show as being in stock but no worries; it is assembled from individual pieces when ordered.