BMW M850i xDrive (G14 / G15 / G16) – Dual 3” X-Pipe Design
The BMW M850i’s 4.4L twin-turbo V8 is a powerhouse of refinement and torque, but the factory exhaust system leaves much of its character restrained. Designed with heavy internal baffling and restrictive flow paths, the stock system mutes the raw emotion of the N63 engine, keeping the soundtrack subdued even in Sport+ mode. The Yonristic Performance Valved Cat-Back system transforms the M850i’s presence — both audibly and visually — unlocking a sound profile that finally matches its performance and luxury.
At the heart of our design is a true dual 3-inch X-pipe layout, engineered to balance exhaust pulses between banks for cleaner scavenging and a smoother, more exotic tone. This equalized flow reduces harshness and amplifies the deep growl of the V8 while maintaining perfect harmony across the rev range. The integrated valve control system retains full compatibility with the factory electronics, seamlessly switching between comfort and sport modes, while also offering our standalone remote-control module for on-demand operation.
Customers can choose between two visual configurations:
– Factory Tip Fitment, which retains the OEM diffuser and stealth appearance.
– Quad Tip Upgrade, available in chrome, burnt, black, or carbon fiber finishes, which requires a compatible diffuser and adds a commanding visual presence.
Constructed entirely from AISI304 stainless steel or Ti-6Al-4V Aerospace-Grade Titanium, each system is precision TIG-welded and mandrel-bent for unrestricted flow. The internal X-pipe geometry and resonator length are tuned to eliminate drone while producing a rich, muscular tone — aggressive under throttle, yet refined at cruise. The result is an exhaust system that enhances performance, saves weight, and brings out the full emotional depth of BMW’s grand tourer.
Key Specifications
Fitment:
BMW M850i xDrive
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G14 Convertible (2019+)
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G15 Coupe (2019+)
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G16 Gran Coupe (2020+)
Compatible with both OEM exhaust valves and Yonristic remote valve control.
Configuration:
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Dual 3.0-inch mandrel-bent cat-back system
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Central X-Pipe for balanced exhaust pulses & smoother scavenging
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Valved rear section with straight-through free-flow design
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Optional quad-tip conversion (requires quad diffuser)
Materials:
Two premium material options available:
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AISI 304 Stainless Steel – high durability, corrosion-resistant, ideal for daily use
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Ti-6Al-4V Aerospace-Grade Titanium – up to 60% lighter than OEM, sharper tone, maximum heat resistance
All systems are fully TIG-welded by hand for strength and aesthetic precision.
Tip Options:
Premium 4.5-inch tip upgrade options (quad or OEM-style):
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Chrome Polish
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Burnt Blue Titanium Style
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Satin Black
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Carbon Fiber Wrapped with Stainless Inner Core
Quad-tip requires an aftermarket quad diffuser.
OEM-style tips are available for stock diffuser compatibility.
Valve Control:
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Fully compatible with factory electronic valve operation (Comfort / Sport / Sport+ modes)
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Includes Yonristic standalone remote valve controller for manual open/close control
Performance Gains: (Realistic, research-based numbers)
Aftermarket cat-back gains for the BMW M850i (N63TU3 engine) typically fall between 8–20 WHP, depending on flow design. Our dual 3” system with an optimized X-pipe falls at the high end of the range.
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Cat-Back Only (no tune):
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+12–15 WHP
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+14–18 lb-ft Torque
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Improved throttle response & faster turbo spool
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Noticeably freer high-RPM breathing
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With Downpipes (no tune):
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+22–28 WHP
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+26–32 lb-ft Torque
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With Downpipes + Stage 1 or Stage 2 Tune:
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+45–60 WHP (combined gains)
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+55–70 lb-ft Torque
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Maximum exhaust flow efficiency
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Weight Reduction:
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Stainless System: ~20% lighter than OEM
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Titanium System: Up to 60% lighter than OEM
Installation:
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100% Bolt-On, no welding, no cutting required
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Uses all factory hangers & factory valve motors
