None, my car rarely gets driven. When I do drive my car, it's good to hit VTEC every so often to keep the oil flowing in the solenoid. I wouldn't redline it everyday, that's just stupid. It's not bad to hit VTEC at all, the only down side is loudness and gas burning (and probably oil burning).
i mean come on lets not be crazy here yea if its not your daily driver or you dont even have vtec then yea of course your not gonna use it that often or even at all but with a daily driven vtec car chances are its gonna scream a couple times a day thats just how it is lolDepends on how pissed other drivers on the road are making me. It's a great stress reliever ripping the shit to 8,500 rpm's. Some days not one time, other days maybe a dozen times. Not to 8,500 every time....