These Edelbrock X1 Ram Log intake manifolds are patterned after the original Edelbrock X1 manifolds introduced in the 1950s for 283-327 small block Chevys. They feature large, free-flowing straight runners for six 3-bolt carburetors. The manifolds include a machined oil fill tube provision and period-correct casting features for the best vintage look and performance for your small block Chevy. The linkage kit, fuel log, and oil fill tube are sold separately.