What is this for?

Look what I purchase for my Dart build... Complete kit Kenne bell for my forged 6.1 hemi.. should be fun... I'm a little worried I will have to cut my fire wall to get the back or the blower in though. I also finished up my front suspension today.. Powder coater hosed me and got paint in the ball joint threads what a PITA.. I will never take those out again.Enjoy. BTW that's a 148MM Throttle Body, enough to suck up small childern, mustangs, chabbys, and ricers!