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Fabspeed BMW M3/M4 (G80/G82) Turbo Back Exhaust Package (2021+)

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$9,488.85 - $9,997.95
Calculated at Checkout
HP (whp) / (crank):
+41 / 47
TQ (ft/lbs):
WT (lbs) / (KGs)::
-8 / -3.6

Looking to get the most out of your G8x M3/M4? Fabspeed has the answer with our Turbo Back Exhaust Package. Starting with our Sport Cat Downpipes that feature high quality HJS catalytic converters. This guarantees the most exhaust flow, reliability, and sound. Then, we use our unique intermediate X-Pipe that features two X-Pipes for proper exhaust scavenging and sound balance. And finally our Valvetronic exhaust, which features Helical Valves from the U.K. that are plug and play with the factory valve controllers. This system is your ticket to bolt on sound and performance without any loss of functionality or CEL’s (Check engine lights).


Treat your ears to that iconic BMW straight six symphony! You’ll no longer have to suffer the anemic OEM sound that BMW blighted this model with. The whole tone of the exhaust changes, with a throaty note that sounds every bit of the 500 HP you have on tap. In the loudest M setting, the exhaust is deep and powerful with very loud and prominent overrun pops and burbles. You’ll actually hear the turbos spool when letting off the throttle. With the car in comfort mode, things are much more tame. No pops/burbles and drone is nowhere to be found. In cabin conversations are just as easy as they were with the stock exhaust system.


Our full Turbo Back Exhaust Package really frees up exhaust flow on the G8x. On our in-house DynoJet, we saw max gains of 47 ft/lbs of TQ at 3,300 RPM and 41 WHP at 6,500 RPM. That’s 47 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 M3 & M4 (G80/G82) sedan/coupe vehicles including Competition Models worldwide (2021+) (RWD & AWD)
  • Constructed from CNC mandrel-bent 14-16 gauge T304L stainless steel
  • Laser scanned and CAD designed for perfect OEM fitment using Ametek Handyscan 700
  • Includes Deluxe Quad-Style Tips in your choice of finish
  • World's first and only “Double-X” midpipe design includes two investment cast “X” sections for increased exhaust scavenging, resulting in a throaty exhaust note with the least amount of rasp
  • Uses aerospace quality Helical Limited exhaust valves imported from the U.K.
  • Retains factory valve functionality for “plug and play” installation
  • Light weight design saves 10 lbs / 4.5 KGs compared the factory system
  • We use a German-made HJS HD tri-metallic 200-cell catalytic converter for the best performance and reliability
  • 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 

Why We Choose HJS Catalytic Converters:

HJS German imported catalytic converters are made from some of the highest grade materials you can find in a catalytic converter. This yields high performance gains and longevity so it wont deteriorate over time like lower grade catalytic converters. These catalytic converters flow up to 93-95% of a straight pipe in most applications. The benefit is that you get the "straight pipe sound" while still being able to provide enough emissions scrubbing to prevent a check engine light. If you'd like to learn more, watch our video about HJS catalytic converters.

DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only, never to be driven on public roads. This product is or contains a Racing Cat Bypass Pipe, which will give you check engine lights on OBD2 cars. We suggest pairing this product with racing software to prevent fault codes and check engine lights. Racing Cat Bypass Pipes are solely intended for track and race cars as they are NOT California Air Resources Board Certified (CARB) and not EPA certified. You are hereby informed and warned to check your local, state, and federal laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.


Returns Policy

To RETURN any system, product or merchandise you must contact us first for a Return Authorization (RA) Number. Special order and custom made systems, apparel, Carbon Fiber Wall Art, and other certain merchandise are NOT returnable. ALL SALES ARE FINAL. To return a Fabspeed Motorsport product an RA number must be requested and if granted the item(S) must be in original Fabspeed Motorsport sealed packaging. A copy of the original invoice and a brief explanation must accompany all returned items. You must follow our instructions for returning items carefully, or Fabspeed Motorsport reserves the right to charge a 25% restocking fee on any OPENED box or repackaged products. Customers are responsible for return shipping charges. If an order was shipped with a promotional “Free Shipping”, and the order is returned, we exclusively reserve the right to charge the customer or distributor for the cost of that original shipping and handling. If a Fabspeed Motorsport Performance package is ordered, and an individual component of that package is returned, Fabspeed Motorsport reserves the right to charge back the performance package discount along with any additionally offered discounts. Return shipped items DAMAGED in transit will RESULT in additional charges up to and including rejection of the competent. It is the customer’s responsibility to ship safely and properly. No returns accepted after 30 days from the invoice date. No credits will be given after 30 days from the invoice date.

To qualify for return, the product must be unused and remain in the original packaging, as well as match the current design and packaging for the product at the time of return. Sounds is subjective and therefore does not qualify for a return of a used product. See Sound Solution Guarantee to see if your product is covered.

Periodically mistakes are made when ordering, or a wrong part is shipped, and you may wish to return an item. We will do everything reasonable to satisfy you. Please contact Fabspeed Motorsport immediately via email at to discuss the circumstances before returning any products. Anything returned without prior authorization from Fabspeed Motorsport will be refused. All returns must be sent back fully prepaid. Our customer service department ( will issue a Return Authorization Number, which must accompany any return. A copy of the original invoice and a brief explanation must accompany all returned items. No returns accepted after 30 days from the invoice date. No credits given after 30 days.


Fabspeed Motorsport cannot be held liable for refusal of, delay of, loss of, theft or damage to a shipment of any item. The customer agrees to indemnify Fabspeed Motorsport for all costs, fees and expenses Fabspeed Motorsport incurs as a result of any violation of any local, state, federal, national or international laws or regulations. Customer agrees to take responsibility for lost packages that were not independently insured or sent without requiring signature. The customer understands they will be liable in the event of additional fees, tariffs, or legal issues such as border seizure. Customer accepts these risks and agrees to release Fabspeed Motorsport of all liability.

Fabspeed Motorsport reserves the right to charge a shipping and handling fee on every order being shipped from our facility. This fee is universal and applies to all retail and wholesale purchases and cannot be waived or credited.

A 6% sales tax will be implemented for every purchase made by a Pennsylvania resident. This fee will be charged for in-house installations and products purchased online, over the phone, and/or via email, this fee is required by law, is non-negotiable and non-refundable.

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