When you guys upgraded your heads....
I would think that once the heads were ported by the shop, they would flow just as well if they were your original ones as if they weren't, but has anyone ever had any issues with this?
My car is a daily driver, so when I finally buy heads, I'd rather just be able to swap them on, rather than having my car in pieces for an extended period of time while I wait for MY heads to come back. But I'll send in mine if it's common to see "issues" with vendor-supplied heads.
Your thoughts?
you could always buy a set of core's used. there's some in the classified every once in a while for a couple hundred bucks. sometimes its worth not having that crap charged to your CC or dealing with the hassle. especially if you want 6.0 heads or LS6 heads or something that would cost extra anyway.

