If you have converted to either front disc brakes or 4 wheel disc brakes on your Beetle, then you need to upgrade your master cylinder to a dual circuit master setup. This upgrade uses an industry first 25mm bore master cylinder for very positive pedal feel and none of the spongy pedal feel from smaller bore masters. Even cars with drum brakes can take advantage of this upgrade not only for piece of mind, but for safety as well. Kit comes complete with our high quality 25mm bore dual circuit master cylinder, dual port reservoir, brake light switch and port plug, everything you need to install this on your pre 67 VW bug.