Weistec BMW N63 4.4L W.3 Turbo Upgrade for M550i, M750i and M850i
Unlock serious performance with the Weistec W.3 turbo upgrade for the BMW N63 4.4 twin turbo engine. Perfect for BMW M550i, M750i and M850i owners looking for a proven BMW N63 turbo upgrade in the UK, this Weistec W.3 kit delivers stock-like spool with dramatically increased airflow and headroom for power when paired with the right supporting mods and ECU tuning. Expect sharper response, stronger midrange and a relentless top end while retaining OEM-like drivability and appearance.
If you are searching for BMW M550i turbo upgrade, BMW M750i turbo upgrade, BMW M850i turbo upgrade, N63B44O2 turbo upgrade, N63 hybrid turbos, UK N63 turbo upgrade or Weistec W.3 N63, this is the solution enthusiasts choose. Supplied by Nforcd in the UK for fast, knowledgeable support and optional fitting.
Why choose the Weistec W.3 N63 turbo upgrade
- 53+ lb/min billet CNC compressor wheels for major flow potential
- 5-axis CNC machined components for precision and efficiency
- High-RPM balanced for smooth, reliable operation
- Substantial power gains throughout the RPM range with proper tuning
- Near stock response and stock-like appearance once installed
- High-flow intake pipes included to reduce restriction and aid spool
- 100% bolt-on installation using OEM oil and coolant lines
- Send-in service for your turbos, with optional core exchange
How the W.3 upgrade delivers results
Weistec fully disassembles and inspects your factory turbochargers, then machines the compressor cover and centre cartridge to accept a significantly larger, 5-axis CNC-machined impeller. Despite its size, the billet impeller weighs the same as the factory cast wheel, helping retain fast spool and excellent throttle response. Externally, the compressor cover is modified for the larger wheel, and high-flow intake pipes are supplied to further improve response and airflow. Each unit is reassembled with new seals and bearings, then high-speed balanced to OEM-level refinement and longevity. All OE oil and coolant lines bolt straight up for a straightforward install.
Best results with tuning and supporting mods
For maximum gains from your BMW N63 turbo upgrade, Weistec recommends suitable supporting upgrades and ECU calibration. Intake, downpipes, intercooling and a quality map will help you fully realise the W.3 turbo potential while maintaining drivability and reliability.
Fitment and compatibility
Engine: BMW N63B44O2 4.4 twin turbo V8
- BMW M550i xDrive (G30/G31)
- BMW M750i xDrive (G11/G12)
- BMW M850i xDrive (G14 Convertible, G15 Coupé, G16 Gran Coupé)
Have a different N63 50i model and want to confirm compatibility or hardware requirements? Contact our team and we will be happy to help.
Installation and fitting
This upgrade requires your OEM turbos to be sent to Weistec for machining and assembly. Core exchange is optional. For professional fitting, choose Nforcd in Warwickshire. We offer expert installation and can coordinate the send-in process to keep your downtime to a minimum. Request a fitting quote at Sales@nforcd.com.
Ordering options
- Send-in service for your original turbochargers
- Core exchange available subject to availability
- All OEM oil and coolant lines bolt straight on for a clean, bolt-on install
Part number
01-563-01920-7
Key search terms
BMW N63 turbo upgrade UK, Weistec W.3 turbo upgrade, BMW M550i turbo upgrade, BMW M750i turbo upgrade, BMW M850i turbo upgrade, N63B44O2 turbo upgrade, BMW 4.4 twin turbo upgrade, N63 hybrid turbos, performance turbo upgrade for BMW, bolt-on BMW turbo kit, high-flow intake pipes N63, billet compressor wheel N63, 5-axis CNC BMW turbos, UK BMW tuning and fitting.
Notes
- Professional ECU tuning and suitable supporting modifications are required to achieve the full performance potential.
- Lead times may vary based on core availability and workshop scheduling.
- Manufactured by Weistec. Supplied and supported in the UK by Nforcd.