whats your milage bro? if car still new than dont expect to be able to perform at peak. also going past 180km/h you need a long stretch of road even with MT. just remember stock tyres is rated at 92H a.k.a. max speed of 210km/h but after considering the safety factor, age of tire, wear and tear most likely the tire should not be used at 200km/h for long periods. pls check your performance tire rating....