Originally posted by 99SilveradoSpeed@Nov 16 2005, 08:11 PM
hey sierra,

are these heads assembled or bare castings???

how much for just the heads? i think i am going with the LS6 cam but your heads sound good to me as long as they are just a bolt on thing..

HP increase???
TQ increase???

would i need a tune from allen or would it be alright for a short time with the stock PCM?
You could run these with your stock tune but would be alot beter off with a good tune from allen. Im not sure on the hp/tq increase but I would geuss with the z06 cam and these heads a good 40hp increase is possible. If you just want the heads I will sell them for $400 plus shipping. The heads dont have any valve springs but I can include some springs that came off the 6.0 heads if you want them.