thanks for the replies on my question about how to hit the 13s. i guess the way it looks form all the feedback is it will take more than just the simple bolt-ons.i just put the 3.55 gears in a week ago so going to a different gear is not an option, i use the car for travel sometimes so 4.10s or 4.30s are to low for my needs.what is the best supercharger out there right now. and does anyone know anything about or have one installed on their 4.6 stang,the ford racing m-6066-m462 supercharger.