VTT S58 “GC” / “GC+” Turbocharger Upgrades

Wheel Sizes / Power Support (Precision style designation)

Ready to take your BMW G8X M3/M4 or F9X X3M/X4M to the next level—without core charges, long lead times, or restrictive factory housings? Look no further. The VTT S58 GC Series turbochargers deliver massive power potential while keeping factory spool characteristics and OE fitment.

We keep what BMW got right, then remove every limitation we identified: restrictive inlets, inefficient bearing housing oiling structure, weak thrust assembly, and everything else bottlenecking S58 power output. We then apply proprietary VTT revisions and cast our housings at OEM-level quality.

The result: true bolt-on S58 turbos that support 800–950WHP, retain all factory oil/water/downpipe/charge pipe connections, and are proven record-setters—holding the G8X ET + Trap Speed records as of 7/24/22.

Key Design Features

• 100% new castings with all OEM restrictions removed — not stock housings with oversized wheels

• Twin-scroll 310 Stainless Steel Turbine Housing for maximum heat tolerance and corrosion resistance

• GC uses a 52mm turbine / 58mm compressor
  GC+ uses a 54mm turbine / 67mm compressor
  (G25-spec 9-blade Superalloy Mar-M 246 turbine wheels with modern aero)

• 9-blade point-milled compressor wheels optimized for flow while minimizing surge

• Direct connection to factory oil, water, downpipe, and charge pipe

• Redesigned bearing housing and upgraded thrust structure

• No core charge — own your stock units and/or resell them

• Once fully released, production units will ship same / next day (confirm stock when ordering)

• 12-month unlimited mileage No-Hassle Warranty — replacement if any issue arises

Purchase Includes

• 1x set of VTT S58 GC or GC+ Turbochargers

• 1x set of VTT GC/GC+ Silicone intakes

Recommended Supporting Mods

Turbocharger upgrades should be paired with fuel upgrades, tuning, intake, downpipe, intercooler, etc. Gains will be seen even on a stock hardware S58, but peak potential requires proper supporting modifications.

Fitment

• 2017–2022 F9X X3M / X4M

• 2021+ G80/G82/G83 M3/M4

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.