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Fabspeed BMW M5 F10 Primary Sport Cat Downpipes

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Fabspeed BMW M5 F10 Primary Sport Cat Downpipes


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.

Eliminate the heavy and restrictive factory catalytic converters with HJS German Tri-metallic imported 200 cell 92% flow high flowing stainless steel downpipes for maximum power and an exhilarating sound.                                                                                                                         


  • Fits all BMW F10 M5 vehicles (2011+)

  • Replaces the restrictive factory catalytic converters with ultr premium quality HJS German emissions technology extra large 200CPSI catalytic converters for increased throttle response, and a more aggressive exhaust sound

  • Constructed out of T304L stainless steel with CNC machined flanges and laser cut brackets

  • Manufactured entirely in-house by our precision machine shop at Fabspeed Motorsport

  • Ultimate quality designed, engineered, Dyno developed at Fabspeed with 25 years of Excellence. 

  • Designed to fit seamlessly with the factory rear catback F10 M5 exhaust system and are also compatible with any other aftermarket exhaust system that is designed to accept fitment of the BMW OEM catalytic converters.

  • Includes two downpipes, labeled left side and right side for easy installation, with hardware included. 

  • Bolt-On and enjoy guaranteed NO Check Engine Lights with HJS Germany Fabspeed quality.  

  • Any other aftermarket brand catalytic converter is unacceptable for the Ultimate Driving Machine. Caveat Emptor. 

  • Fabspeed Motorsport USA 25+ years of Excellence and Experience. 

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. This product contains a High-Flow Sport Catalytic Converter solely intended for track and race cars as it is NOT California Air Resources Board Certified and not EPA certified. You are hereby informed and warned to check your local, state, and federals 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

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.