RK Autowerks catless downpipes remove the primary restriction in the exhaust system to improve flow, supporting quicker turbo spool and reduced backpressure for strong, immediately noticeable horsepower and torque gains. Designed using state-of-the-art 3D scanning and prototyping, they’re engineered for OEM-like fitment and proper alignment on the vehicle.
Constructed from mandrel-bent T304 stainless steel and finished with CNC velocity stack turbo flanges, these downpipes feature precision TIG-welded construction and heavy-duty V-band / exhaust flanges for a secure, leak-resistant connection built for long-term reliability. Stainless O2 sensor bungs are mounted in the factory locations for straightforward installation.
Note: RK Autowerks does not offer heat shields or ceramic-coated versions of these downpipes.
Features
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T304 stainless steel construction with mandrel bends
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Precision TIG-welded joints
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Heavy-duty stainless V-band / exhaust flanges
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Factory O2 sensor locations retained (stainless bungs)
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Helps reduce under-hood temperatures through improved exhaust flow
Fitment
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2025+ BMW G90 M5
WARNING (Emissions / Legal)
Catless downpipes are for off-road use only. Installation will typically trigger a Check Engine Light / Service Engine Soon warning. Removal or modification of emissions equipment is prohibited for vehicles operated on public roads in many jurisdictions.
