its still impossible to 210 on a 5sp Z. Taller tires and 8k redline would not give an extra 25mph because they said 210 not 205. If you have ever driven a Z to 160mhp our Z is almost at redline, so how is possbile to hit 210 mphs? BTW, I have 18's and JWT ecu so that I can hit a couple hundred rpm's over stock and I say its impossible. Conditions would have to be perfect to even come close to 200mph. -Jeff