I got 3 sets of these heads in 2 weeks ago and while being down in North Carolina for the last 10 days visiting shops that I do bussiness with to find out that GM has recalled them due to valve seats being to deep, And I called my GM rep to find out this is true. So anyone having these heads may want to send them back for a refund. And there is no news when they will be replaced.

Thanks again Carl, you just saved a customer some grief graemlins/thumbsup.gif

Can you guys describe these new Vortecs? What improvements were they SUPPOSED to have over the original heads?

Just curious as to what's out on the market. Thanks and kudos to you Carl, for getting the info out there.

I priced those heads here a while back from a GM dealer :eek: $3500.00 cdn

Originally posted by 70_FathomBlueMalibu:
Can you guys describe these new Vortecs? What improvements were they SUPPOSED to have over the original heads?

Just curious as to what's out on the market. Thanks and kudos to you Carl, for getting the info out there. =
Here ya go ;)
BowTie Vortec (http://www.sdpc2000.com/catalog/277/products/229034/SB-Chevrolet-Bare-Large-Port-Vortec-Bow-Tie-Cylinder-Head.htm)

Anybody get a chance to flow them babies yet or dyno!

Originally posted by blumont:
I priced those heads here a while back from a GM dealer :eek: $3500.00 cdn Just looked, Summit is listing them at $562.39 each complete. I don't think the exchange rate is quite that high.

I do have a question for the performance guys. Would these head be an improvement over the stock ZZ4 aluminum heads on a ZZ4?

Originally posted by hilljack:
Anybody get a chance to flow them babies yet or dyno! Both the intake and the exhaust seats have been dropped roughly 3/16 down from where they are suppose to be. I don't think they will make much power in this condition.