once the cars back from my mates bodyshop, im wanting to start getting more power out the MFi engine, got a few cosmetic parts for it to tidy it up but im wanting to get some more power from the existing engine, but not a real amount of engineering or engine knowledge.

i know the most obvious would be changing to a replacement panel filter, 4-branch and stainless straight through exhaust but what else would be ideal for the car to get some more power from it but still remain reliable (ish) lol.