TweetFirst that's a great feat. Congratulations on the fat loss. Now to add the 4 inches. What have you been doing for chest and back? Weather you are losing body fat or gaining muscle is going to be determined mostly by calories. As long as you are training with progressively heavy weight and intensity. Start by increasing your calories by 500 a day. Most of that being protein. Count calories, count everything. Focus on heavy compound movements in the gym. With an emphasis on back and chest. I am here for more but that is the basics to concentrate on.