0.92AR T4 Twin Scroll IWG 179390 this item. 0.92 A/R T4 Twin Scroll (Internal WG) - Part # 179390. ALL BORGWARNER EFR SERIES TURBOS AVAILABLE. BorgWarner EFR 7670 Turbo. BW utilizes their 70mm Gamma-Ti turbine wheel as the optimal match for the 57.2mm inducer / 76mm exducer FMW compressor for unmatched response.
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