Hey guys pretty new on here so any help would be appreciated! ive tried to have a look around but cant seem to find an answer. I purchased a second hand G6et with 40,000ks on it 6 months ago and im starting to mod. I already have a stealth black stage 3 plazmaman cooler and a process west 4" race box (still need to buy the battery relocation and the other cooler pipes) my future plan was to buy: true trac diff oil line filter kit for turbo siemens vdo 80lb injectors 3.5" X force exhaust system with 4" dump was going to get these all fitted by a family friend mechanic then get a tune at Gentech (im in canberra) but the bloke there sayd the FG turbo can only take 320kw max and I could get 300-315 without the exhaust or dump (because they can cause overboost?) so I was thinking do I just save money and do as he says and see how it is then save up and do a second upgrade and tune, OR just do the exhaust and either buy a BA turbo with port and flapper mod, or a gtx3582r from the start with one tune instead of upgrading turbo later? and if both those turbos would be a hassle free direct fit and I wouldnt have to change anything else? any advice on those mods ^ ^ and they way I should go would be appreciated! thanks