My S70 T5 is coming off the road for a while so I can get it to where I want it without running it. I plan on doing the full works such an exhaust, decat, intercooler, etc.

I do have hands on experience with cars but I've never changed a turbo myself. How hard are they to do on your own? Ideally looking at a 19T but I want to know what I need to buy, will I need injectors and what injectors, etc. Is there anyone that specialises in fitting turbos to save my own hassle? I understand I'll need a remap with the new turbo so it runs properly. I understand the standard downpipe (Well I will be upgrading) will fit a 19T? Please shed some light as I am new the T5 scene