Ive nailed 140mph quite a few times...no limiter...the only thing that stops the car is the fact that ive hit red line in 5th and do not have a sixth. Throw a lil boost at the p5 and it will swing to the far right of the speedo real quick. The same pull I get at 40mph carries right through to the end with no slow down or struggle...this is at a mere 16lbs.