I just got an alignment after installing all new ball joints, tie rods, tie rod ends, full energy suspension bushing kit, and ksport rr coilovers 10k front 12k rear. When I enter a hard left hand turn it will oversteer, but it will not do that when taking a hard right. When taking a right it kinda slides. I grips ok but you can hear the tires sliding a little on the pavement but, no oversteer. It feels dangerous when it breaks loose and I dont want my girlfriend driving it like that. I do have a 185 width tire on the left rear and the rest are 195. I have factory sway bars and no tie bars. I am pretty heavy on the drivers side i weigh around 250. I havent tried it with anyone else in the car.
you should get all the same tires first
start with same sized tires all the way around. Also consider this; you’ve stiffened your suspension exponentially from how it came from the factory. You’re are running high rear spring rates, which is something that is generally done to promote rotation in a corner on front drive cars. You may also want to try a more agressive tire compound. if it continues after this, try running a larger front sway bar.
I know the higher spring rates are supposed to increase rotation but it only does it when taking a left. I belive the front right tire is toed in. When looking at it it dosent buldge at the bottom like the left tire does, like its being pulled in. So I am gonna have someone else check the alignment.