Weistec W.3 Turbo Upgrade for BMW N63 4.4L V8 M550i, M750i, M850i (G30 G31 G11 G12 G14 G15 G16) | Bolt-On Hybrid Turbos with High-Flow Intakes | N63B44O2 | UK Supply & Fitting

Weistec W.3 Hybrid Turbochargers for BMW N63B44O2 4.4 Twin-Turbo V8 - M550i, 750i, 850i

Transform your 50i with Weistec W.3 hybrid turbochargers. This direct-fit upgrade retains factory manners while unleashing serious headroom for tuned power on the BMW N63B44O2. Ideal for G30 G31 M550i, G11 G12 750i and G14 G15 G16 850i owners who want fast-spooling, high-flow turbochargers that look OEM but deliver big-turbo performance once mapped. Our workshop experience and customer feedback have been outstanding - sharper response, stronger mid-range and relentless pull at the top end when paired with appropriate supporting hardware and ECU calibration.

Highlights

• 53+ lb per min billet compressor wheels - serious airflow capacity
• 5-axis CNC machined components for precision and efficiency
• High-speed VSR balanced for smooth, reliable operation
• Direct-fit stock housing upgrade - OE oil and coolant lines are retained
• High-flow intake pipes included to reduce restriction and aid spool
• Near factory response with much greater power potential when tuned
• Send-in upgrade service for your turbos with optional core exchange

How the upgrade works

Weistec disassembles your original turbochargers, inspects all components, then machines the compressor cover and CHRA to accept a significantly larger, lightweight billet impeller. The reprofiled housings and precision-balanced rotating assembly keep response crisp while supporting substantially higher mass flow. Externally the units retain an OE appearance, and the supplied high-flow intake pipes further improve breathing and transient response. Reassembled with new seals and bearings, each turbo is balanced to stringent standards for long-term reliability.

Best results with tuning and supporting mods

To fully realise the W.3 potential, pair with quality ECU calibration and appropriate hardware such as a freer-flowing intake system, upgraded downpipes and efficient cooling. This combination delivers a fast-spooling, road-friendly package with the ceiling to support serious power goals on the N63 platform.

Compatibility

Engine: BMW N63B44O2 4.4 twin-turbo V8

• BMW M550i xDrive - G30 Saloon, G31 Touring
• BMW 750i xDrive - G11, G12
• BMW M850i xDrive - G14 Convertible, G15 Coupe, G16 Gran Coupe

Also commonly searched as N63TU2 hybrid turbos, G-series 50i turbo upgrade and direct replacement performance turbochargers for BMW 5 Series, 7 Series and 8 Series. If you have a different N63 variant and want to confirm fitment, get in touch.

Installation and fitting

This is a send-in turbocharger upgrade. Core exchange may be available subject to stock. For professional installation and to minimise downtime, choose MJ Modifications in Warwickshire. We can handle removal, shipping, refit and post-install checks. Request a fitting quote at info@mjmodifications.co.uk.

Ordering options

• Mail-in upgrade service for your original turbochargers
• Core exchange option when available
• Direct-fit - reuses factory oil and coolant lines

Part number

01-563-01920-7

Why enthusiasts choose W.3 for the N63

• OEM fit and finish with hybrid turbo performance
• Excellent drivability for daily use with headroom for high output builds
• Proven upgrade used by our customers with consistently positive results

Popular search phrases

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Notes

• Professional ECU tuning and suitable supporting modifications are required to achieve the full performance potential.
• Lead times vary with core availability and workshop scheduling.
• Manufactured by Weistec Engineering.