Bro... i m not sure whether kejap can go up to 140kmh, but to me it's not a problem at all i fitted with 2 mini turbo on my MYVI and the result.... its great... especially you have power and when you are at the highway, and going at a speed of 110 kmh, the rpm reading is only 2700 - 2800  . Normally it has already passed that mark by far...... if you dun believe it you can try it yourself and feel the difference