I've noticed that my car will pull to right or left during braking, but only sometimes, i don't think i need an alignment. My car has 38800 miles on it, could it just the conture of the road?

 

How is the tire pressure? I had a slight pull and that was due to the my P/F tire being 5 psi low. Also, maybe but unlikely a stuck caliper piston? Since it pulls both directions, thats why I say unlikely.

 

Ditto on the pressure check. It seems like the S2000 is more prone to this than any other car I have ever owned.

Another note. If the car is doing the same thing under acceleration, ie., pulling one way while accelerating and then jerking the other when you let off, the rear pressures are uneven.

 

check your tires, or maybe your brake rotors needs resurfacing

 

It's due to the ruts/groves on the road. My s2k does this everytime i get into a rut or grove. Also camber plays and issue with the contours of the road.