First Upgrades

[Bunta]

If I upgrade my intake into a 2g mas/w intake arm and filter do I also need bigger injectors (550cc) and if I upgrade my injectors do I have to upgrade my Fuel Pump (Walboro 255HP) and if I upgrade my fuel pump do I have to upgrade my AFPR. Or can I just have the 2gMas and Fuel pump for now and boost like 15 until later on when I spend more money.

Keep in mind these are the first things going into a stock car and that Im just trying to get all the BPU's on first.

If this is all wrong then what should I start with first.