Would probably run ya about 60 bucks for a set of four rods. You don't want to just take out your tired, old stock rods and have em shot peened; then slap em back in. Generally it's done as part of a process of restoring/improving the rod which can include magnafluxing, cryo treating, polishing, balancing, and smoothing out the various surfaces which mate with other parts. For the cost it takes to prep a set of stock rods you can almost pay for a set of cheaper forged rods like Eagles or Crower Econobillets.