Dartnut said

What I don't get is why do we have to get the aftermarket heads checked out for valve job, guide fitment, etc. and why are they not ready to bolt on OOTB?
Other than changing springs that match your cam, why do they even have to be touched or checked at all?
That is something that has always irked me.
Is their quality control that piss poor, or do they not even care?
They must be just literally slapped together on old misadjusted equipment or by assemblers who don't know or care a lot about their customers.....

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PRH said

Nobody is making you have the heads checked out.
Just like you don’t “have to” check any clearances when assembling a motor, or degree in your cam.

Yesterday I got a text from a builder I do a lot of work for.
He had a blown BBC on the dyno and was just giving me a dyno report.
That motor got some new Brodix Race Rite heads put on it.
They were run basically ootb(inner springs removed for cam break in).

I’m sure industry wide there is a fairly high percentage of aftermarket heads that get installed right ootb.
Sometimes that ends up successful...... and sometimes not.

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