When i lived in Southern California, i was playing with a Subaru WRX on the freeway and took my 04 Crossfire Limited Automatic to 150mph and it felt like it still wanted to go faster. The WRX matched my speed but neither one of us wanted to go faster so we let off and called it a draw, lol. I heard we top out at 153mph, not sure. Now that i live in Spokane county of Washington, with a 60mph speed limit on the Highway, i probably won't be able to find out, lol. Have fun but most importantly , be safe!!!!