Sorry Bro,
Over time you will lose most of what you gained through steroid use. Most of the muscle that was built with steroids cannot be maintained naturally no matter how good your diet and or training is.
Testosterone creates an environment in our body in which this muscle growth can take place, even on a reduced calorie diet. In the absence of this extra testosterone the environment obviously isn't as favorable and your body will then began the process of returning itself to homeostasis (the process that maintains balance or equilibrium of an organism's internal environment
).
Anybody that tells you differently is just kidding themselves. I'm not saying that you'll turn into a fat slob or become a 6 pound weakling. But if you have illusions of maintaining that rockhard physique you have created using steroids, you will be sorely disappointed.
Remember, our bodies are not concerned with us being buff. The more muscle we have, the more energy is required for us to stay alive and from our bodies perspective that's just plain inefficient.