[tbyrne]

The heads above doesn't include the upgraded springs, pushrods gaskets ect... They are just the CNC ported heads. We also sell their complete 6.1 heads -

6.1 Maxx Head kit includes:
Fully CNC ported 6.1 castings, 2.08x1.60 valves (370cfm), priority valve job, titanium retainers, Viton seals, heat insulator intake gaskets, Manley polished bee hive springs, 5/16 chrome moly push rods, fully assembled.

Would you like a quote for the heads by themselves or including the intake manifold and/or tuning?

Numbers that we've received from INDY and from customers that I've talked to have show gains in the 45+hp range. I'm going to be dynoing these on my own 6.1 soon. The car is actually being taken apart in the shop now. I have the Maxx head package and will also be doing the intake manifold and B&G took care of the tuning.