S58 GC Series Turbocharger Upgrade

The VTT BMW S58 GC Series turbocharger upgrade is engineered for the G8X M3/M4 and F9X X3M/X4M, offering a significant power potential without core charges or long lead times. Key design features include 100% new castings with OEM restrictions removed, a twin-scroll 310 stainless steel turbine housing for heat tolerance and corrosion resistance, and 9-blade point-milled compressor wheels optimized for flow. The GC model features a 52mm turbine and 58mm compressor, while the GC+ model uses a 54mm turbine and 67mm compressor. Both utilize G25-spec superalloy turbine wheels. The VTT S58 GC Series turbochargers support 800–950WHP and retain all factory oil, water, downpipe, and charge pipe connections, making them a true bolt-on solution. They have been proven to hold record-setting performance metrics for the G8X platform. A 12-month unlimited mileage, no-hassle warranty is included. Recommended supporting modifications include fuel upgrades, tuning, intake, downpipe, and intercooler for peak potential, though gains can be seen on stock hardware. Fitment is for 2017–2022 F9X X3M/X4M and 2021+ G80/G82/G83 M3/M4 models.