MAMBA 9-6 Heavy Duty Turbo Upgrade Wheel Kit / Mercedes Benz AMG M157 S63 Forward MGT2867 Billet Compressor Wheel + 9 Blade High Flow Turbine Wheel + Performance Repair kit (For Twin Turbo). Compressor wheel & turbine wheel Balanced by SCHENCK already. CHRA (complete core) is recommend to be balanced again when you assemble them all. Upgrade Forward Garrett MGT2259 to MGT2867 to support extreme top end HP. Upgrade factory 1113 Mercedes Bnez AMG S63 (W221) V8 MGT2260S turbo to MGT2867 to support higher top end. Housing & turbine housing needs to be machined / Ported to fit ...