Fabspeed Primary HJS Sport Downpipes for BMW G90 / G99 M5

Replace the matching G90/G99 M5 primary catalyst assemblies with stainless downpipes using HJS 200-cell cores. The primary catted section is separate from the secondary catalyst-bypass pipes. Based in Fort Washington, Pennsylvania, Fabspeed Motorsport designs exhaust, intake and ECU-tuning products for Porsche and other sports cars. Development includes evaluation on a dynamometer, on the road and at the racetrack.

Technical Details

• Manufacturer product reference: FS.BMW.G90.SCDP.
• HJS 200-cell primary sport-catalyst assemblies.
• T304L stainless construction.
• CNC-machined flanges and laser-cut brackets.
• For matching original or original-fit downstream exhaust.
• Confirm sensors, heat shielding and hybrid-engine installation requirements.
• Secondary pipes are not included.
• No cutting or welding specified for matching joints.

Use restrictions

Fabspeed specifies closed-track and off-road use only for this catalyst-replacement component and states it is not CARB- or EPA-certified for road use.

With over 20 years of parts experience, PMB Performance can help check the application. Share your VIN and photos or references for the component being replaced before ordering if the match is uncertain.

Fitment & Compatibility

Use the application details below together with the original component and any existing modifications.