I think the look you're after is a good idea but anything over 120 seems kinda pointless to me. If you're on the street exceeding that speed you should be paying attention to the road, not a needle on a gauge. Besides I'll echo what chris99gmc said, your likely to get a massive ticket, lose your license, or worst case, kill yourself or someone else. Now, if you're talking about the track...well I can't see you needing one there either, road course or drag strip.