ATK 5.9 Magnum crate motor horse power

What all do you guys do to the bare Edelbrock heads?
Firstly, you wouldn't believe how filthy some aftermarket heads are out of the box. So they are hand cleaned. Burrs and flaws addressed. From there, pretty basic cleanup, valve job, and assembly using our components. Those components are QC'd by us. And IMO better.

Since the above is kinda "sales BS-Ish" to get to brass tacks, No they arent cnc'd, or fully ported, that's labor intensive and at this HP and rpm range, the HP per dollar isnt there.

Even on our big block 632 engines, the cost added to take them from 815 street HP to 840 is worth it to a drag racer...but not the average street customer.

I will fully confirm that they are however 1000% better than buying a set out of the box as far as quality, cleanliness, and longevity goes.