I have have put a full exhaust and a cold air intake on my car so far and was wondering what you guys wold recommend to do next?

p.s. correct me if this is in the wrong section.

 

Front brake cooling guides, front camber plates, rear trailing arm bushings, rear bump steer correction, better brake pads.

 

i upgraded to slotted rotors with hawk pads and i got blue hawk pads for racing and i have forge racing ducts, i know after some research not to change the BoV but does anybody have anything to say about wastegates or should i just leave it for later, and would anybody recommend methanol injection?