Best iron cyl head?

rumblefish360 said

Thanks Myron. How are the Magnum versions?

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Rob,seen a worked set at my buddy's shop. A cutter/ bowl & guide massage/1.97 intake flowed low 260's @ 500-550. IMM's 2.02/1.60 Ferrea valve/ optimized cutter flow 270+ ootb. A good looking head.