I am looking to install the meanest sounding performance enhancing exhuast setup (from headers to mufflers) I can find for my '90 GT, but it has to pass emissions testing in good ole Maryland, if anyone can give me some suggestions, that would be great. Also, I kinda wanted to go with long tube headers, what brands do you all reccomend and is installation difficult? thanks! 
Don't ya just hate Md's emmissions testing program!!! 
get in good wit a good mechanic and just have him run his stang, or someone else's for the emmissions test. 
