Factory Magnum Heads

Don't know if any one saw the write up on the small block dyno shoot out in Mopar Muscle. This is an annual dyno shot out the magazine does, this year it was sb limited to 410 cid and 93 octane. As with past shoot outs it's power/cost combination that wins the shoot out. After market parts extract a points penalty so they need to make enough power to offset the penalty.

This year almost all the competitors stuck with factory heads (Indy cylinder head won with magnum R/T heads). They all but Indy used factory magnum heads, no X, J, O, U or 308 heads. All these guys made in excess of 500+, had to be a reason they chose the magnum head.