I have a friend that Has a DuraMax that has a box and he is getting 600HP out of it. Its a 4x4 and he can smoke all 4 tires. Impressive. He also blew the front tranny with that power. Maybe you can take him up on the race and maybe he will blow his tranny too. Then you can laugh all the way to the finish line. Just be careful. Take it to the track and have fun. My bet is on him if he has the right box.
Good luck. Keep us posted.
2005 Mustang GT, Black w/ Dark Charcoal interior
IUP, Active-Anti Theft Alarm
Bright Aluminum Wheels w/Locks
Perma Plate, Window Tinting 35/20/5
Molded Splash Guards, Sequential Tail Lights
SIRIUS Satellite Radio, Front License Plate Delete