What is the part number to the blue/white Z06 valve springs? How do they differ from the yellow colored springs? How high of a lift cam will they hold up to? And for the money, should I get those springs or a set of Comp springs?

 

I am not sure of the part number, but I have a set that I only used for about 5000 miles. PM me if you are interested in them.

 

If you are going to use the cam in your sig i think the Z06 springs will work. Dont quote me on this but i think they are rated up to .550 lift. Past that you will need the Comp 918 springs. I dont know the difference between the colors though. You should be able to get a set ogf Z06 springs for much less than the comps.