Call and cancel your order for the headers! They will only add about 3-5 hp for the $270-$305 your dishin' out for em. Plus, if your doing the install yourself, I hear they are a pain in the butt. The only time you would REALLY need them is if you are going with a supercharger or NOS.
Trust me! H or X pipe first. You won't regret it. You can get a nice one for less cash than the headers, and the hp gain is up to 35 extra. It's been proven in magazine comparisons and such. Plus, the H-pipe is a cinch to install.
I think you will be seriously disappointed in your headers for the first mod...
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'96 GT
5-speed,K&N air filter,Roush Cold Air kit,80mm MAF,Mac Cat-Back,Mac Pro Chamber H-Pipe, FMS 3.73's, FMS 70mm TB, Steeda Tri-ax
T-Bone's '96 GT
[This message has been edited by T-Bone (edited 05-19-2000).]