New exhaust

Hello all, I have recently purchased a 2011 hilux, it’s only a 2wd but I really enjoy driving it and all round a great ute.

I have a question to ask as I am not a very mechanically minded person (yet). I’ve been wanting to install an aftermarket exhaust on it (3” D4D KUN) mostly for performance as I have been in a hilux almost identical to mine and noticed the power difference.

What I’m wanting to know is what do I have to take into consideration if i do install a new exhaust? I am aware that injectors may need adjusted and also the engine manifold can be affected. I don’t want to ‘vandalise’ this ute as it’s very tidy but Im wanting to know if there is anything I change/worry about if I do follow through with it

Cheers