2012 Chevy sonic 1.8L performance

[Hitakaru]

I’m looking to improve my 2012 Chevy sonic 1.8L 4cyl. Engine to its best performance if possible. I’ve been doing research upon Research and getting nowhere. I want to maximize the HP if possible. I’ve already change out my exhaust to a 3in and I have a cold air intake from K&N installed. I’m looking to have a custom made camshaft that will be more durable to withstand a turbo which will be the very last thing I want to put on.
My stages:

Stage 1:
Exhaust -completed
Cold air intake- completed
Alloy 17in rims
ZZP coilovers
Intercooler throttle body

Stage 2:
Improved Camshaft-
Improved piston
Fuel injections
Manifold

Stage 3
Turbo
Dino tune