COMP Cams Shaft Rkr BBC Bdx B-Dke/Drt B - 1513CPG With a 2024 aluminum rocker and 8620 hardened steel shaft, this shaft-mount rocker system adds stability to the engine which frees up horsepower. This system features 1.7 ratio rockers for BBC w/ 18 degree Brodix Big Duke/Dart Big Chief. MSRP: Was: Now: $2,971.20 Add to Cart