i like where you head is at. I too have been thinking about n20 but dont look at if the motor can handle it because there is a guy with a slk320 with a 100 wet shot and he is clocking off 12.62@111mph with an auto. And he had something like 72k on the motor. I would be more thinking about your traction control and how to keep it from cutting the ignition and destroying your motor that way. I dont have a fuse to disconnect for the tc so I could only spray 2nd gear and up and not spin but I am also running 295's in the rear ..