 help
I bought some used cylinder heads off of ebay, even tho it was probly stupid, it was an amazing deal if they perform like the guy said. He even had perfect feedback, so i bought them. But i can still get a refun through paypal if i do it quickly, cuz for all i know these could be the stock heads from a GT and i just got jerked off. So is there any way that i can have these heads tracked to the original people that made them to find out what they are? they have like the serial number on them i just don't know where to go. i would greatly appreciate any tips. | 
