The 1031b Crossbow Kit has everything you can install yourself without a bow press in just a few minutes. 

This kit contains the same universally sized split limb dampeners as the #1031, with easy to install stirrup dampeners, and a retention spring dampener.

Instructions: The limb dampeners should be placed midway distance between the cams and barrel. The limb dampeners are universally sized to fit gaps between 3/8" up to 1 1/8" wide. These install easily with provided screws. You should place the arms of the Limb Dampeners parallel to the limbs and face them on the inside of the limbs.

Instructions for Retention Spring Dampeners: You'll want to place these approximately half-way down the spring, leaving fletching clearance.

Instructions for the Stirrup Dampeners: These install easily without a bow press, if you have a removable style stirrup (with a screw in place). You simply unscrew the stirrup and place one on each side of the stirrup.