ATK Performance Eng. SP31-B LS 408 CI Stoker Short Block
This short block is built for engines that are going to be running Boost or Nitrous. It has upgraded ARP main studs, ARP 2000 rod bolts and Total Seal CS AP ring package with Steel rings gapped accordingly for engines pushing 10+ PSI. Due to so many variables, we do not rate these for Power or Boost limits. Your engine may not necessarily come with all components listed, but they are listed as our recommendations of parts to run for optimal performance.