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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
Designed for racing applications (not street legal)
11 37 7 599 021
2015-Present John Cooper Works (JCW)
and poor fuel economy
RK Autowerks S63 Stage 2 Turbo Upgrade X3 Designed for racing applications (notService requires customer cores. 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
