I was wondering if anyone knew how the new 206cc intake port vortec iron head compares to the original 170cc version? Heres a link: http://www.sdpc2000.com/cart.asp?action=prod_detail&catid=3129&pid=229034

Other then the port size change and larger valves, any other changes?

Combustion chamber and ports are an evoloution of the LT1,LT4,Vortec, Fastburn series of heads. The new Vortec race heads are the best of the bunch. The lead engineer on the project worked on all of the above mentioned heads as well as our Nascar stuff.

If anyone's interested here are the part numbers and GM Parts Direct prices for the new vortec heads:

25534351 Vortec Bow-Tie Small Port Cylinder Head, Bare - $254.29
25534371 Vortec Bow-Tie Large Port Cylinder Head, Bare - $273.85
25534421 Vortec Bow-Tie Small Port Cylinder Head, Complete - $426.67
25534431 Vortec Bow-Tie Large Port Cylinder Head, Complete - $457.14

Steve

I take it that price is per head? Doesn't seem like such a bargain anymore, :( .

Yes, per head.

Steve

How about some flow numbers..