M4 full exhaust systems coming soon for the 2011 GSXR600. Here is a dyno chart. All runs with stock map & pump gas.

That dip both stock and your pipe between 6-8 is UGLEE.

Hopefully thats just the stock fuel map going rich to knock the edge off the exhaust noise at 7K (where noise testing would be done) since the bike seems to make peak power at twice that revs at 14K. Maybe that can be tuned out with a PC5. Your full system seems to pull good on top though.

When is this coming out? is this for the megaphone styled system?

pm me with all the info you have please, as i will be getting my 2011 in a few weeks.

Cost ?