Imo, telling buyers to hold off buying these heads is a bit of a knee jerk reaction.
Do we think that bolting on some ootb RPM type heads is going to make more power on that exact build?
The ootb price difference is $480........ which isn’t quite enough to cover the cost of prepping and a stage 1 type bowl job.
So, the way I see it...... as long as the TF’s don’t make less power than the RPMs on that type of build, they’re still i viable option.
It’s certainly possible the RPM’s are the better choice for a build like that....... and I’m sure at some point, that test will happen.......... then the question will get answered.
If “I” were building a combo like that, and the expected power was clearly under 500hp(based on the mild cam, dual plane intake, etc), I’d use prepped RPM’s. Not because I think they’re better, but because for basically the same price as the TF’s cost....... I’d make more $$$ selling and prepping the RPM heads.
If the target was solidly in the mid/upper 500hp level...... and the cam/manifold combo could be sized accordingly....... then I’d use the TF heads.
