SD Heads and gasflowing

SDSmurf

SDSmurf

I was just wondering what quality the SD heads are straight out of the factory? If any of the more technically inclined could help me out?

I remember a friend getting his 05 gsxr750's head done, and it went from 126hp to 134hp with no other mods (already had a full system). He also used the same dyno before and after, not affilliated to the mechanic...

Anyone done this to the SD and was it worth it in your opinion? I'm going to be getting my throttle bodies balanced, and the guy is also very well known for his excellent headwork - Just thinking it might be worthwhile save up for a while and have everything done at once if it's worth it...

Benefits other than power increase? Cons?