That kit shouldn't need any additional parts as it is. The blower is making small boost. The kit isn't going to be blowing the hoses off if installed correctly.
Now if you decide to change the pulley and go for more power you will probably have to spend some money. For things like pulley, bigger injectors, fuel pump booster/fuel pump, higher flow blow off valve and what not. But nothing anyone who wants to make more power wouldn't be expecting. But anyone looking to do that in the future might as well get the kit with the D1 or F1 blower since the P1SC is going to limit what the kit can make anyways. But a 500+rwhp daily sounds fun. Especially with gas prices coming down.
What else should there be? Looks like most kits to me.
Now if you decide to change the pulley and go for more power you will probably have to spend some money. For things like pulley, bigger injectors, fuel pump booster/fuel pump, higher flow blow off valve and what not. But nothing anyone who wants to make more power wouldn't be expecting. But anyone looking to do that in the future might as well get the kit with the D1 or F1 blower since the P1SC is going to limit what the kit can make anyways. But a 500+rwhp daily sounds fun. Especially with gas prices coming down.
there is nothing to that kit at all. Awesome.
What else should there be? Looks like most kits to me.