Description 7° billet performance valve stem keepers or locks are designed to fit BC retainers (BC2010 and BC2011). Precision machined from premium billet bar stock chromoly steel and heat treated for maximum strength to insure against shoulder shearing (common with stock and lesser quality brands). K20A / K20Z VALVE KEEPERS / LOCKS 7° billet performance valve stem keepers or locks are designed to fit BC retainers (BC2010 and BC2011). Precision machined from premium billet bar stock chromoly steel and heat treated for maximum strength to insure against shoulder shearing (common with stock and lesser quality brands).
