So I've had my 02 wrx wagon for about 2 weeks. I bought it completely stock with 140,000 miles, the only things I've done to it are a Snorkus and muffler delete. Me and my friends all like to drive our cars hard. However I have noticed that my WRX under steers terribly even with good performance tires on it. Then if I'm going around a turn and hit a bump or have to swerve hard and fast the rear end looses its mind and I find myself 4 wheel sliding all over the road. What will correct this best besides an alignment and tires?