Are Speedmaster Heads Good? I've Heard a Lot of Bad Press on Edelbrock 340 Heads Lately

I’ve got a set from ProMaxx. They are cast overseas but all the machining is done here in the states. Nice casting and good machining. They have an as cast and a larger CNC’d port available. Not quite as much flow as the TrickFlow but better than the speed master versions or Edelbrock. Priced in the middle, for another option.

Promaxx gets the Chink castings and machines them here erasing the crap work into excellent work. I have a set of CNC small block heads. Veeeeeery nice!