Okay, bit of an update. Just got a return call from the FedEx guy, he requested that I fax over the HS7 form with 2A checked. I orginally faxed it over with 2B checked. He made no remark on DOT regulations or anything like that. He simply said
"They're official BMW taillights, so just check 2A and you'll be fine. Your item is in flight now, so this will prevent any customs delay."
Sounds like easy street! Glad I didn't check item #7, stating that the car is a show/race car
I'll let you guys know if it passes customs without a hiccup.