Has anyone put a new clutch in ? Check all your subframe bolts. One may be getting loose and letting the subframe slip back and forth. This happened on my rsx it would pull real hard on grooved roads and bumps. After, inspecting the subframe one of the bolts wasn't torqued all the way down. After, torquing the bolt down the car didn't pull like it did. It's worth a shot to check out.

 

Ok, this is not a bash on the toyo because they are an amazing company but I too once bought Toyo Proxie 4, two years back and I had the same issue. while driving on the highway it was far worse and slightly scary. While changing lanes at high speeds I was sometimes jerked over into the other lane. All these issues came about the first day I had the tires on. My first reaction was to get them rebalanced, realigned but that did not fix it, although it did help slightly. I then noticed the tire shop put 40psi (COLD) in them. big no no for me so I dropped the pressure to 34 front, 35 rear and it ran smoother.
The next set of tires I had on made me noticed that the issue was gone and it was the Proxy 4's!!!

 

I too have proxys 4. And at first i noticed the same thing. But it seems to have went away. But it is definitely your tires. Also your tires are a good bit larger then they should be. oem is 245/40/17 so you should be running a much smaller aspect ratio.

 

could that really be the reason why it pulls that like when i go over a speed bump?
i put the psi to 32 all around
and for just normal driving on a straight road i forgot to say that my car pulls to the right just a bit and then when i accelerate it pulls even harder to the right, i guess thats just alignment or is that the tires too?
thanks guys so far for all your help

 

so today i checked my rims to see if there was any cracks or bends and my friend told me to check if I had hub centric rings which I found out I did not but I also heard some rims dont need them. I have 18inch sportmax 940. Would missing the hub centric rings cause my problem?

 

If your wheels don't have hubcentric rings, tighten the lugs while the wheel is off the ground. If the wheel, isn't centered, you'll get vibrations and possibly broken wheel studs

 

so I borrowed my friends wheels and tires and found out that it doesnt feel scary no more when I go over a bump. so it looks like I am going to have to buy new tires. But it stills pulls to the right when I accelerate.

 

get stock 16inch wheels.

 

It's the 18s causing the pulling (provided the car is not toed-out too far). I've driven many s2ks with big wheels and they all do it.

 

really? but it does it with 17s also and doesn't the newer s2ks have 17in stock rims? it feels more like an alignment problem to me though