I HAVE A 2001 S2000 WITH 36K AND I HAVE 18" RIMS LOWERED BLAH BLAH BUT MORE OR LESS I DONT PEEL OUT OR BEAT UP ON MY CAR UNLESS I AM ON THE FREEWAY ONCE IN A WHILE.. I TOOK IT TO MY LOCAL SHOP NOT THE DEALER AND THEY TOLD ME THERE WAS A SERVICE BULLENTIN FOR S2000 THAT YOU WILL NEED TO REPLACE THE U JOINTS AND THE CV BOOTS? WHAT DO YOU THINK ? AND I HAD RIMS LOOKED AT TWICE THERE FIND NO BENDS AND BAL PERFECT. LET ME KNOW.,

 

Do you have centering rings on your rims???

 

We don't got no "U-joints" on this here car, bubba.

 

I don't know what's wrong with the s2000 but I do know your caps lock key needs some tuning.

 

definitly sounds like a wheel balancing issue

 

Turn your cap locks off and don't feed the trolls! Well, technically Xviper isn't a troll. He's much too helpful usually.

 

If there was just some more detail in the description, then people could render a better diagnosis.
1. What about those centering rings? An absence of the proper centering rings fore/aft can cause a vibration at speed. Such things can have a "resonance" range, where below or above a certain speed range, the vibration can lessen or even disappear.
2. CV joints going bad usually will cause an increasingly harsh vibration the harder the acceleration - heavy throttle, hard acceleration, more vibration.
3. Your lowered car may not be aligned properly. How's the alignment?
4. Checked tire pressures lately?
5. All the lugnuts of the proper type for the rim? Are they all present and accounted for and torqued on correctly?

Answer these and you may have just answered your own question about why your car behaves the way it does.

As others have said, TURN YOUR CAPS LOCK OFF and next time, provide more details.