With a lift like 11mm I am pretty sure you will need to change out the valve springs. With that lift and duration revving pretty high chances are pretty good you will float a valve. If they do not offer a spring I would highly recommend finding out what spring you should use and how much seat pressure (open and closed) you will need to run. Also installed height and where the coil bind will be. I will try and do some more research on this over the weekend.
-Adam
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