Is anyone running these heads? They look like they're reasonably priced and they come with good valves.

Yes running, yes good valves. Had difficulty getting correct springs for HR Cam. The Marine version of the heads come w/o springs. They do not have a real thick casting. I would not use them on a high hp blower engine.

Ed B

When they showed the new 525 at Miami last year, If I remember right I saw a set of their heads on that motor. Not sure if Mercury uses them on all of them but that ought to tell you something about them.

Stop being cheap crazy A few good sets of AFR's and your big blocks will be breathin fire

he's thinking for me Travis!!and I'm a tight a$$!!

Well you said it, i didn't

Ol' Dandy Dyno Don has a lot a Dutch blood a flowin' through them vains!

Been tryin' to call ya Don!

Traviss, my motors breathe fire now.

Sure.. mr.. I got big blocks with bloooooowers

Had their aluminum Performer RPM oval port heads on the 454 in my former boat. With their RPM oval port dual plane intake manifold, 227/235, .594"/.609" 112 degree hydraulic roller cam and mild 34 degree total ignition advance, the engine dyno'd at 464 HP and 510 Torque.

I wasn't looking for the last shred of output - more interested in reliable/no-fuss operation which they gave me.