well some people say different things about breaking them in, just like with a new engine. Some say they put a bunch of miles on it, and others go right out to the track and fire it up for the first time in the pits.
I've had mine in for 3 years now and there is no problems at all with them. All i did was drive for about 30minutes, then I beat the hell out of it
go out RIGHT NOW and feel the huge difference!