This is a complete rebuilding kit with all of the available parts for a 1955 Buick with the Delco Moraine power brake booster and master cylinder assembly.
Please make sure this is the exact rebuilding kit you need for your vehicle as we do not accept returns on kits. If you are unsure you can send us pictures of what you have and we can help you identify your brake booster/master cylinder assembly.
Detailed instructions for rebuilding this unit should be in your vehicle specific shop manual. If you do not have one we suggest you purchase one.