Product Description Specifications Featuring an induction hardened cast iron cam gear with a billet crank gear, this Magnum timing set has a heavy-duty, heat-treated double row chain for mild/street performance '65-'91 Chevrolet 396-454 Big Block. Category: Engine Components>Timing Chains Core: N LTL: N MPN: 2110CPG Proposition 65: Y Special Order: Y