See n!cole’s post for temp’s. Twelve’s are definitely possible. I ran @ full weight w/ a full tank of gas. I’d guess if I were on a 1/4 tank I could have easily picked up 1-2 mph which would have put me around 12.8~ish. Overall I’m very happy considering I’ve done absolutely minimum mods to the car and the X’s run about 13.7-13.8 in stock form.