Fabspeed Sport Cat Down Pipes 2021+ BMW M2/M3/M4 (G8X)

Sale Price$3,295.99 USD
In Stock. Ready To Ship

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Give your G8x M3/M4 more sound and power with Fabspeed high-flow catted down pipe.

Fabspeed Motorsport's engineering team consulted with HJS Motorsport and chose the largest HJS catalytic converter that would fit the G8x chassis.

This guarantees the most exhaust flow, reliability, and sound. This down pipe will flow 93% of a 3'' straight pipe, all while providing emissions compliant performance and NO check engine light. There's no need to run cat bypass pipes.


Fabspeed downpipes do an excellent job of subtly increasing the exhaust volume and deceleration pops and burbles, with no increase of unwanted interior drone. For a more aggressive exhaust note, add Fabspeed's intermediate X-Pipe.


An in-house DynoJet, this high-flow sport cat down pipe kit made max gains of 23 ft/lbs of TQ at 3,200 RPM and 20 WHP at 6,500 RPM.

That’s 23 crank HP! Take a look at our dyno graph and you can see that power is gained throughout the entire power band.


  • Fits all BMW M2, M3 & M4' (G80/G82/G87) sedan/coupe vehicles including Competition Models worldwide (2021+) (RWD & AWD)
  • Adds an impressive 20 WHP and 23 ft/lbs of TQ
  • Constructed from CNC mandrel-bent 14-16 gauge T304L stainless steel
  • Light weight design saves 2 lbs / 0.9 KGs compared the factory system
  • Uses a German-made HJS HD tri-metallic 200-cell catalytic converter for the best performance and reliability
  • Laser scanned and CAD designed for perfect OEM fitment using Ametek Handyscan 700
  • No CEL (Check Engine Light) guaranteed
  • Simple bolt-on installation, no cutting or welding required
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty 

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Customer Reviews

Based on 1 review
Gary Bifulco
Fabspeed downpipes

Really happy I got these, sounds great clean and crisp, sings a great note Upper in the rpms, smooth power delivery , and most important no Check engine light. And no exhaust smell. Great quality product every bmw g8x needs this!