This brake return system is a good idea and definitely improves feel and modulation when compared to the OE system. The parts install is easy and straightforward. If the kit came with instructions, I would rate it a five star product.
Finding the tunability of rear brakes.
Fasst's Rear Brake Return Spring Kit offers tunable pedal resistance and a better overall feel at the pedal. It provides a consistent pedal feel minimizing the "on-off" feel of most rear brakes.
The pedal resistance can be adjusted by how much preload is placed on the spring. The Return Spring Kit also minimizes debris from jamming the master cylinder as well as eliminating the stock return spring that attaches to the pedal.
Rear Brake Pedal Return Spring Kit consists of spring, spring bucket and nut. The Spring Bucket contains the spring as well as seals the master cylinder with the stock rubber dust boot.