Hello just a quick one. Before buying a gti turbo I’m just wondering if there is any upgrades for the thp 150 turbo 5303-970-0121. I’m after a bigger compressor wheel. Mambo offer bigger wheels for both sides but a bit unsure if it will fit in the housing on a stock turbo. Also is there anyway to adjust boost via the wastegate so boost comes on later in the Rev range. Car is used for around 5 Trackdays a year and also in the road so want boost to last longer towards the top end cheers.