Thanks for all the great advice. I'll be honest here. I'm partial to the ls6 intake, because I want the cool factor of popping the hood and seeing the ls6 coil covers. Lol! Can you trim them to fit ith the stock intake?

If so, I'd probably sell the ls6 intake and buy the circle d 278mm.

I haven't purchased a water pump yet, so if all I need to buy is a spacers, and a relocation bracket for the idler pulley, it's not that bad.

I know the converter will be the most bang for the buck out of the two.