This is the ultimate exercise for chest growth.
I have been doing them less then two months and it looks like my pecs are about 2 inches thicker. Get a pair of elite rings (they are around $75) and start working on them. You might be too weak to lower yourself to parallel when you start out, but you will still see the benefits very quickly. They are also awesome for shoulders, biceps and lats. Really I think they are probably the best upper body exercise out there.