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Fabspeed BMW F8x M3/M4 Primary Catbypass Downpipes



Eliminate the heavy and restrictive factory catalytic converters with straight-pipe, high flowing stainless steel downpipes for maximum power and an exhilarating sound.

Fits all BMW F8x M3 & M4 vehicles (2015+)

The perfect option for track cars and those who seek the ultimate in agressive exhaust sound

Mandrel bent pipes with minimal welds to minimize failure under regular use and increase flow

Designed to fit seamlessly with the factory exhaust system, or as an add-on to Fabspeed’s Valvetronic Exhaust System.  (Also compatible with any other aftermarket exhaust system that is designed to fit like OEM.)

This product replaces the factory catalytic converters and may trigger a Check Engine Light.

Please also bear in mind that this system does not include catalytic converters, so the Check Engine Light (CEL) will most likely be triggered. This is not an indication of any actual issue with the engine, and does not prevent normal vehicle operation.


Fabspeed’s product mentioned above is not C.A.R.B. certified and are for Off-Road Use ONLY in the state of California.  The purchaser or end user of this product is responsible to contact their state/county jurisdiction of their country of origin to see if this product is compliant with their local road usage.

All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty

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