The bike shouldn't have any issues with knocking unless you're using cheap fuel or turn the boost up with out a proper tune or water injection.
That being said Nick will be more than happy to make you an intercooler for the stage one as an add on.
We wanted to make a clear distinction between stage 1 and stage 2 kits when you look at the bike and the price will reflect that.
You can have something called "boost creep" that can cause the knocking and pinging issues, regardless of your tune, even if it is proper... That's a mechanical issue, look up EVO 3 BIG 16G creep problems, I used to live that everyday until I ported it and swapped wastegates, then I upgraded to my sneaky pete 20G, all MHI turbos of course... Regardless of a manual or electronic boost controller, I still had the issues present of creep that caused knock and detonation...
As I told you water injection is good and bad, more stuff to go wrong when you depend on it the most, Corky Bell said it best and I quote, "RULE: A water injector on a turbo car is a poor-excuse band-aid for not doing the job correctly the first time."
Not saying its bad, of course he said that 12+ years ago, and if done right can go beyond the limits of the current setup...
This is the way I understand water injection from experience... You will also have to have a water reservoir for the injection system, clean and a lot of it if you want to make the power you are seeking. Whenever you "force" air into the intake, things get very hot as you compress air, so the combustion chambers get VERY, very hot. Colder plugs are needed to help prevent knock and detonation in GASOLINE engines... To prevent detonation, you have to use more fuel, like 12:1 ratio or less. This fuel does nothing for combustion, and is only there to cool down the engine and prevent the very thing you are tuning against. Water injection is intended to take the place of this fuel. If tuned correctly you can make as much power as a non-water injection system, with less fuel. You will, however, have to make more boost.
It has been so long since I have done any repairs, modifications, and tuning with water/alcohol injection I will shut my mouth and wait... Maybe its dummy proof now and things have changed... Spearco and a different brand were all I messed with about a decade+ ago...
