The 4 Pack Muscle Building Stack is one of the more advanced bodybuilding stacks available. The is a great deal for under $150. You can still custom build your stack if you want, but we sell these 4 together because it is by far the most popular combination of legal steroids. Competing bodybuilders will often run this as a stack 3-4 months before training, and then run these same 4 products as cycle leading up to their competition. By running the Winsdrol in the final weeks before a competition they are guaranteed to look totally cut and shredded to the core !