RK Autowerks catless downpipes remove the primary exhaust restriction to improve flow, helping the turbos spool faster and reducing backpressure for noticeable horsepower and torque gains. Developed using advanced 3D scanning and prototyping, these downpipes are designed to deliver OEM-like fitment and proper alignment.
Constructed from mandrel-bent T304 stainless steel with CNC velocity stack turbo flanges, each unit is precision TIG-welded and secured with heavy-duty V-band/exhaust flanges for a strong, leak-resistant connection. O2 sensor bungs are positioned in the factory locations for a straightforward installation.
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 by improving exhaust flow
Fitment
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2020–2022 BMW X5M (F95) — S63
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2020–2022 BMW X6M (F96) — S63
Important: Slip-On vs Flange Style
These downpipes are available in slip-on and flange styles. Please specify the correct style at purchase. Incorrect selections may not be eligible for returns/exchanges.
Note: In 2022, BMW switched some models from slip-fit to flange-style downpipes. Visually confirm your factory connection style before ordering.
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.
