RK Autowerks S58 Stage 2 Turbo Upgrade – M2/M3/M4/X3M/X4M
Shipping & Returns
Shipping
Shipping calculated by size and weight of products ordered.
Refunds & Returns
Returns must be requested within 15 days of delivery and are subject to a restocking fee of up to 25%. After 15 days, all sales are final. Some special order parts are non-returnable, and items must be unused and in resellable condition.
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Warranty
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RK Autowerks Stage 2 Turbo Upgrade for S58
Overview:
The RK Autowerks Stage 2 Turbo Upgrade is designed for S58 owners who want significantly more power while maintaining stock-like drivability, fast spool, and full integration with OEM systems—including launch control. This setup is ideal for street and track use, offering a reliable path to 900+ WHP when paired with the right supporting modifications.
Built In-House:
Each unit starts with OEM turbocharger cores. We precisely machine and modify the housings on our in-house 5-axis CNC mill to accommodate upgraded internals. This method preserves OEM fitment and results in a true bolt-on turbo solution—no cutting, no adapters, no surprises.
Performance Highlights:
- Supports 40+ PSI of boost
- Delivers 900+ WHP with proper fueling and tuning
- Retains OEM spool characteristics and drivability
- Maintains factory launch control functionality
- CNC-machined & assembled in-house
- Direct bolt-on using factory mounting points
- No tuning included – intended for experienced tuners or shops
Vehicle Compatibility:
- BMW M2 (G87) – 2023+
- BMW M3 (G80) – 2021+
- BMW M4 (G82/G83) – 2021+
- BMW X3M (F97) – 2019+
- BMW X4M (F98) – 2019+
Core Exchange:
OEM turbo cores are required with your purchase. Your upgraded units will be built using these cores unless otherwise arranged. If you are sending in cores for rebuild, please allow for 1–3 business days turnaround depending on our current queue.
Important Disclaimer:
Do NOT use factory inlet pipes.
Use upgraded inlets that match your intake system. Failure to do so will void warranty and disqualify your unit from exchange.
Why Choose RK
RK Autowerks manifolds are engineered and built in-house in Fort Worth, TX. We don’t outsource. Every unit is CNC-machined and hand-assembled for precise fit and performance. Trusted on street builds and world-record track cars alike, this is the same manifold platform we use in our own 1000+ WHP vehicles.
Core Deposit- Will Send Core Back within 21 Days of Receiving Turbos from RK
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