These small block V8 or V6 rocker arm kits include 16 stamped steel rockers with pivot balls and nuts. These self-aligning high quality rockers have a nominal 1:5.1 ratio. Use P/N 10089648 for single service part. Technical Notes: Use on all V8 models except 1997 or newer LS1 design engines. This kit includes 16 pieces of P/N 10089648.