Planning a small trip to the USA...

[falcon]

i go across the border every few days in my r33,
the worst i get is getting sent in and having them search my car.
usually while talking to me they get my to shut the car off cause apparently my exhaust is too loud for them,, *rolls eyes
my car doesnt have drls and they dont care.

you'll be fine.

dude, ALWAYS turn off your car as you roll to the booth. clutch in.

I've gone through in some ridiculously loud cars. and by doing this everytime had no issue.