I was told by doug from bamachips he's tested two sets of those and they both made an amazing 3 rwhp
I had ordered them but after talking to him i canceled the order, also if your going supercharged i wouldn't waste the money. If you decide to do it anyways install from what i hear is pretty easy but i never got a quote on it so i dont know HOW easy. As for the warranty, nothing you put on your car can void your warranty completely, if something breaks and they think its because of a mod they can refuse to fix it under your warranty but if you put in a cold air intake and your brakes stop working they cant refuse to fix your brakes because of an intake, get my drift?
Ontop of that... not to start a debate but why a supercharger? turbo would be better for the money but it depends on the kind of car your trying to make