4.5″ Performance Downpipe for BMW X3 M40i (G01) & X4 M40i (G02) B58 Engine

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Technical Specifications

  • Application: BMW X3 M40i (G01) & BMW X4 M40i (G02)

  • Engine: B58 3.0L Turbocharged Inline-Six

  • Core Diameter: 4.5 Inches (114mm)

  • Catalyst Option: 200-Cell High-Flow Metallic Catalyst (GESI-type) | Catless Version Available

  • Material: T304 Austenitic Stainless Steel

  • Flanges: Precision CNC-cut, utilizes factory-style V-band connections where applicable

  • Finish: Polished or brushed (as per configuration)

  • O2 Sensor Ports: Includes pre-and post-cat bungs for factory oxygen sensors (plug included for post-cat if tuning out CEL).

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