could be the amp. if you didn't already, you should check all the fuses.
ya if the metal is too thin it will definitely sound bad. think of it like when a trunk rattles like crazy because it's too thin.
Does the whistling almost sound like a turbo? Or is it the more annoying kind of whistling?
If you get the ROUSH cold air intake then yes, you have to chip your car. Might as well.
ricer math. that's the best kind!~
haha your about to but a GT.
keep the body washed and the oil changed. leave it inside a garage.
Whats up with those seats? Other than that, I think it looks pretty good. Kinda straying away from the current mustang look.