I don't think the OP is supposed to even touch his engine until he hears something from Roush.
Personally, after about 1,000 +/- miles on a brand new $20K +/- all aluminum FE, I would be spend the time and/or money to have the engine, headers and the rest of the car re-torqued and re-tightened.
Maybe even change the
oil with a good
oil filter that has a micron rating of around 25.
