Valvetronic Designs
Valvetronic Alpina B8 / BMW G16 M850i Valved Sport Exhaust System
Valvetronic Alpina B8 / BMW G16 M850i Valved Sport Exhaust System
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BMW G16 850i Gran Coupe / Alpina B8 Valved Exhaust System
Full T304 Stainless Steel System with OEM Valve Integration
Overview
The BMW G16 850i Gran Coupe and Alpina B8 deliver incredible performance and refinement—but their stock exhaust note leaves room for excitement.
Our Valvetronic Designs Valved Exhaust System is engineered specifically for this platform to enhance presence, sharpen tone, and add measurable performance gains.
This full system bolts directly to the OEM downpipes or can be paired with a free-flow front race pipe setup. Valve operation integrates seamlessly with the factory Sport and Sport+ driving modes, allowing instant sound control from the driver’s seat. As a direct OEM replacement, it installs with no modifications and is guaranteed to deliver a richer, more engaging soundtrack through the entire rev range.
Why It Works
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Bespoke Platform Design: Engineered specifically for the G16 850i and Alpina B8 for perfect fitment and optimized acoustics.
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Full Mandrel-Bent Construction: Maximizes exhaust flow for improved throttle response and power.
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OEM Valve Integration: Retains factory valve functionality for quiet cruising or aggressive sound on demand.
Sound & Control
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Valves Closed: Maintains refined, comfortable tone for daily driving.
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Valves Open: Delivers a deeper, more aggressive note with added volume and character.
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OEM Integration: Controlled via Sport and Sport+ modes—no extra remotes or wiring required.
Construction & Options
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Material: T304 stainless steel for durability and corrosion resistance.
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Weight Savings: 15.7 lb lighter than the factory exhaust.
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Craftsmanship: Precision TIG welds for strength and a high-end finish.
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Tips: Designed to reuse OEM tip outlets for a factory-fit appearance.
Fitment
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2018–2024 BMW G16 850i Gran Coupe
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2018–2024 Alpina B8
Installation Notes
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Direct replacement for the OEM exhaust system—no cutting or welding required.
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100% reversible—return to stock at any time.
What’s Included
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Full T304 stainless steel valved exhaust system
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Integrated OEM-style electronic valves
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All necessary hardware and clamps
Specifications
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Tubing: Full mandrel-bent T304 stainless steel
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Valves: OEM-style electronic valves with factory integration
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Weight Savings: 15.7 lb lighter than OEM
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Tip Compatibility: Designed for OEM outlet reuse
PLEASE EMAIL US AT: CUSTOMERSERVICE@VALVETRONIC.COM WITH ANY QUESTIONS
ECU tuning is the process of adjusting the engine control unit's software to enhance vehicle performance, efficiency, or fuel economy.
It can, depending on the manufacturer. Many warranties do not cover modifications like ECU tuning.
Use the highest octane fuel recommended for your specific tune to ensure optimal performance and safety.
Yes, a properly tuned car can be used daily, as long as the tune is tailored for reliable, everyday driving.
CPC (Central Powertrain Controller) and TCU (Transmission Control Unit) manage your vehicle's powertrain and transmission systems, respectively.
Map switching allows you to change between different tuning settings (maps) for varying driving conditions without having to retune the ECU.
Yes, if done by a professional using proper tools, ECU tuning is generally safe for your vehicle.
ECU tuning works by modifying the software that controls engine parameters like fuel mixture, ignition timing, and boost pressure to optimize performance.
The process of installing a tune depends on the vehicle’s make and model. Some tunes are installed by connecting a tuning device to your car’s OBD-II port and uploading the tuned software, others may require ECU unlock.
Stage 1 is for vehicles with no modifications, stage 2 is for vehicles with bolt-on upgrades or downpipes installed.
We offer post-installation support, troubleshooting, and guidance on using your tuning software and hardware.
Choose tuning software that is compatible with your vehicle, has good reviews, and suits your performance goals (e.g., reliability vs. max power).
