Aftermarket Cams

[Dan85]

Hi All,

My bike came with a second set of cams which i believe are the same as the cams currently in(well out but anyway) the bike. Is there anyway to tell? im pretty sure the core was sent and exchanged for the new set eg web style and not a new billet core. also i have attached a picture of the cams below and im just curious what the letter represents. Thanks guys
   

[Maj]

casting mark usually
look on the end of the cam for stamped numbers and grinders name or trademark

[Dan85]

Maj to the rescue again. one brock intake and one stock ex spare. cheers.