BMW S68 G90/G99 M5 CENCAL Free Flow Race Downpipes - G90 M5/G99 M5
Pipe size Performance downpipe
Catalyst Review product description
Application B58 BMW / Supra
Build data

Specs that matter for this part

Hardware

Flow-focused exhaust path

Large-diameter tubing, smooth bends, and a flex section reduce restriction versus the factory exhaust path.

Validation

Catalyst configuration

Review product description setup. Review local emissions requirements and product notes before street use.

Requirement

Direct bolt-on hardware

Designed to retain OEM-style fitment without cutting or welding on supported applications.

Downpipes can affect emissions readiness, sound level, and calibration needs. Review the product description before ordering.

BMW G90 / G99 M5 S68 CenCal Free Flow Race Downpipes

Unlock the true performance of your S68-powered M5 with CenCal Free Flow Race Downpipes, engineered specifically for the G90 and G99 platform. Designed to significantly reduce exhaust restriction and improve overall flow, these downpipes deliver faster turbo spool, increased power, and a much more aggressive exhaust tone.

Now available with flexible configurations, you can choose exactly what your build needs—whether you're upgrading a specific section or going all-in for maximum performance.

Configuration Options

  • Primary Free Flow Race Downpipes Only
  • Secondary Free Flow Race Downpipes Only
  • Full Set (Primary Free Flow Race Downpipes + Secondary Free Flow Race Downpipes)

Free-Flow Race Downpipes (No Restriction)

Removes all internal restriction, allowing exhaust gases to exit as efficiently as possible.
Results in maximum performance gains, sharper throttle response, and significantly increased turbo spool and sound.

These are 100% free flowing with 0 restriction in these downpipes.
Note: without a tune your car will throw a check engine light with aftermarket downpipes.

Construction

  • Manufactured from high-quality T304 stainless steel
  • Precision TIG welded for strength and durability
  • Integrated flex sections to reduce vibration and stress
  • Built to handle extreme heat and high-performance use

Performance Benefits

  • Increased horsepower and torque
  • Faster turbo spool and improved throttle response
  • More aggressive, raw exhaust note
  • Reduced backpressure for optimal engine efficiency

Compatibility

These downpipes are designed to pair with OEM or any aftermarket exhaust system. For optimal sound and performance, we recommend running them with the CenCal Stainless Valved Catback System.

Fitment

  • BMW G90 M5 (S68)
  • BMW G99 M5 (S68)

Important Notes

  • Professional installation recommended
  • ECU tuning recommended for best performance
  • NOTE: The video on the product page is running the Primary & Secondary downpipes paired with our Stainless Valved Catback Exhaust!
⚠️ THIS PRODUCT IS FOR OFFROAD USE ONLY

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