GTO cornering ability

Its a 99 civic Si. Omni street series coilovers. Omni front upper control arms, function 7 rear lower control arms, skunk 2 pro series rear camber arms. Megan racing front upper strut bar, Megan racing rear lower tie bar. The tires that are on it now are 205/50 15 Kuhmo escata MX in the front, escata ASX in the rear. I do need an alignment, but would it effect my handling that much?
Not sure what kind of tires she has, I know they are the factory 17s, so I think they are a 245/45