ZL12 Hyd. Roller Camshaft
This cam has a little more duration than the ZL11x at 224/228 degrees which makes it more suitable for a manual transmission car. Lift numbers are .580" and need our 6.vps510. Choppy idle and pulls strong to 6600 rpm. 80-100 hp with ported heads and external mods. Not as drivable as the ZL11x in an automatic. Hardened pushrods recommended.