Stock Heads Flow Better with Ferrea Valves?

[SNW Vette]

Hi,
Will the intake or exhaust flow increase if you just swap out the stock valves for Ferrea’s? I have heard that the exhausts can help on ported heads but have never heard anything about the intake valve comparison.
I am taking the heads off of my ’99 C5 and will mill ~0.030” to raise the compression. I am also changing the cam so I will have the springs off anyway.
Thanks for your help,
Steve

[Racefan12]

Very little if any...the only gain would be with the fact that they are swirl polished...only way to increase flow would be to port & polish them...Its still a good idea to replace the valves b/c the ferrea's are stainless steel (stronger), lighter, and swirl polished...I've seen a couple big cam stock valve combo's let go b/c of stock valve failure...good luck!
<img border="0" alt="[Camaro]" title="" src="graemlins/camaro.gif" />