Sonny!!! :wavey:wdsonny said:You all forget why the K20A2 doesn't boost as much. It doesn't need too. The head design between the Cobalt and RSX is like night and day. The A2 head flows much better than the Cobalt, that is why it pushes 12psi stock. Pound for pound of boost the K20 will out perform the Cobalt. It's about the Hustle 'N Flow. I am not back, but caught a break with the internet for a few hours.