thanks. I had heard they were, and apparently they aren't. I'll re-use them. My pocket book loves using parts I already have :) ! Owned about 8 magnums, but never took the heads off of one..... until now. All of them ran good in vehicles except the 5.2 and this 5.9 that I bought out of the vehicles. 5.2 has been on the stand for a while, and this 5.9 we recently just purchased.
