I tried to return them when he sent them because I specifically asked for steel rockers and did not want aluminum and he sent these and told me he doesn't know of any steel ones for magnums BS and he would have to charge a restock fee and I pay shipping . If I had known that I wouldn't be able to use any of it I would have. Just returning the rockers wasn't worth it but now the timing chain was no good . And I bought high$ valve covers just to run those rockers. I could have spent all that money on a solid roller set up with steel rockers and been as happy as a fat girl on prom night.