***BMW N63 STG1 Pure Upgrade Turbos*** -The only true turbo upgrade set available for these cars. -Custom Billet Compressor wheel -Heavy Duty Large Pad Upgrade Thrust -CNC Machined -High Speed VSR Balanced DYNO RESULTS: N63 Power Record! PURE Stg1 Turbo Upgrade 640whp 680wtq! 2011 550i BMS JB4, 91 oct + meth
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