Summit Small Block/Poly Engine True Roller Timing Chain Set

This Small Block/Poly Engine Timing Set has a rugged True-Roller Chain, Teamed up with Steel Crank and Cam Sprockets. The Crank Sprocket has Multiple Keyways, which allows you to set the Cam Timing to Normal, or your choice of Degree’s in Advance or Retard. Maximum Advance/Retard at Camshaft: 4 Degree’s. Maximum Advance/Retard at Crankshaft: 8 Degree’s