VTT - B58 GC/GC+ Turbocharger UpgradeSupport power level GC Stock 600WHP GC MID Stock 650WHP (2 Port only) GC+ Stock 800WHP Ready to take your B58 to the next level? Dont want to deal with core charges, long lead times, or restrictive factory housings? Look no further! VTT has you covered with our 100% new casting B58 GC GC MID and GC+ turbocharger upgrade. We start by keeping the great design elements of the factory B58 turbo and removing the not so great ones such as the small factory