You're gonna love your cam/headers. I did the VS cam and SD headers, and a 3.4" pulley. I haven't even gotten my car tuned and there is an awesome amount of torque increase. What cam are you going with?

Also, words of advice on the flex pipe from the SD Headers. Theres a 99% chance you will have to replace the flex pipe for SD headers. It leaks really bad. Buy ZZP's double wall flex and have it welded in.