Is this a stock or upgrade turbo??

After my boost issues still being present after a Mr Muscle blast I think the VNT control is coked up. It's not a job I wish to do in an evening so I'm thinking of just replacing the turbo and then cleaning up the original one (I have 1 weekend a month to myself, that's not going to be until the end of September now and will be spent with my partner doing far better things than working on this car again!). I've been looking around and there's a lot of parts options for similar costs, but I'm not sure on what I'm actually looking at. This one for instance:

https://m.ebay.co.uk/itm/GT1646V-751851-Turbocharger-FOR-Audi-Seat-Skoda-VW-Golf-V-Passat-BJB-BKC-BXE-NEW/122491482256?hash=item1c850fb090:g:XmAAAOSw~y9ZFR5R&fits=Cars Year%3A2006|Car Make%3ASkoda|Model%3AOctavia|Cars Type%3A1.9 TDI|Variant%3A1Z5 [2004-2013] Estate|Platform%3A1Z5|Plat_Gen%3A1Z5

Is this a stock BXE turbo I can just bolt straight on, or would it be an "upgrade" and need mapping? I'm thinking of replacing the turbo, properly deleting the EGR system (Currently had a bodge to block it off) and remapping it. Hopefully just buy some bits, give them to a local garage/tuner and wait for a bill at the end. However if these GT1646 turbos are stock then I won't bother deleting/mapping for now and just replace the turbo unit and EGR Cooler pipe (Pipe snapped, hence thinking of deleting) to keep costs down for now...