Hello to all I am currently having my 426 built for me all billet internals top to bottom. I am waiting on supercharger and before I have tunner order it I wanted to ask if anyone knows about this newer whipple and know what stage one vs stage two is? I know stage two has -8an fuel rail and 112 billet throttle body. How much does this help and why? I would think I need -8 an anyways ? If anyone has experience with this please let me know. Also if anyone knows if these are ready to ship or still waiting??