RK Autowerks S63 Stage 2 Turbo Upgrade

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The RK Autowerks S63 Stage 2 Turbo Upgrade by RK Autowerks is engineered for enthusiasts seeking substantial power gains without sacrificing the drivability or reliability of the factory turbo system. This upgrade preserves stock-style spool characteristics and maintains full launch control functionality, making it ideal for street and track performance.

To accommodate larger internal components, OEM turbo housings are precision CNC-machined in-house using 4-axis milling. This approach retains factory bolt-on fitment and eliminates the need for fabrication, adapters, or complex modifications—delivering a straightforward installation experience while maximizing performance potential.

This Stage 2 turbo upgrade has demonstrated proven results, including a verified 9.7-second quarter mile on the BMW F90 M5 platform using stock wheels, tires, and full factory weight. Paired with complementary enhancements such as RK forged internal components, methanol injection, and charge coolers, this setup supports significant horsepower potential while maintaining reliability for daily and high-performance use.

Key Features

• CNC-machined OEM housings for factory bolt-on compatibility
• Enhanced internal turbo components for greater airflow and power
• Launch control functionality remains intact
• Optimized for drivability, spool response, and reliability
• Supports high-performance builds without extensive modifications
• Dragy-verified performance results

Vehicle Compatibility

• BMW M5 (F10, F90) – 2012–2021+
• BMW M6 (F06, F12, F13) – 2012–2018
• BMW M8 (F91, F92, F93) – 2018+
• BMW X5M (E71, F85, F95) – 2009–2021+
• BMW X6M (E71, F86, F96) – 2009–2021+