BMW 3 Series 335d E90 E91 E92 E9x 3.0 Diesel M57D30 Hybrid Twin Turbo Upgrade Kit – What You Need to Know
If you own a BMW 3 Series 335d from the E90, E91, or E92 generation, you already know how capable the 3.0 M57D30 diesel engine can be. But for drivers seeking a major performance leap, the BMW 3 Series 335d E90 E91 E92 E9x 3.0 Diesel M57D30 (2006-2010) Hybrid Twin Turbo Upgrade Kit – K26/BV39 Billet Biturbo Set 450+ BHP is one of the most effective and reliable paths to serious gains. Engineered for fast-road use, this uprated turbocharger pair transforms spool characteristics, midrange punch, and high‑rpm airflow while maintaining everyday driveability.
This upgraded biturbo set replaces the factory turbochargers with a high-flow hybrid K26 large turbo and a BV39 billet small turbo, both designed, machined, balanced, and calibrated for demanding enthusiasts. Whether you’re chasing stronger midrange thrust, quicker response, or a power potential exceeding 450 bhp, this comprehensive upgrade delivers impressive results.
What This Hybrid Twin Turbo Upgrade Kit Does
The M57D30 engine in the 335d uses a sequential twin‑turbo system. The small turbo handles low-end boost and response, while the larger turbo delivers power at higher rpm. This hybrid kit optimises both halves of that system by replacing key components with larger billet wheels, upgraded housings, and durability‑enhancing hardware.
The result is a pair of turbos capable of moving substantially more air while reducing lag and improving efficiency. Every unit is VSR balanced for smoothness and longevity, ensuring refined operation even at increased boost levels. With suitable supporting modifications and mapping, this kit can unlock well over 450 bhp from the 3.0 diesel platform – a dramatic improvement over stock.
Key Performance Benefits
The BMW 3 Series 335d E90 E91 E92 E9x Hybrid Twin Turbo Upgrade Kit offers multiple advantages for both road and performance-focused builds:
- Significantly higher airflow thanks to oversized billet compressor wheels
- Improved low‑rpm response from the BV39 hybridised small turbo
- Stronger midrange and top‑end from the uprated K26 large turbo
- Smoother, more refined operation due to full VSR balancing
- Durability upgrades including a 360-degree thrust kit and stepped gap piston ring
- Fast-road calibration for a usable, responsive powerband
- Capable of delivering 450+ bhp with appropriate supporting modifications
These benefits make the upgrade suitable for spirited road driving, high-performance diesel builds, and drivers wanting both torque-rich usability and weekend performance.
What Makes the K26/BV39 Hybrid Biturbo Setup Special?
This kit is far more than a simple replacement. It is engineered to outperform the OEM units in every way, using high‑precision machining and modern billet compressor technology.
The hybrid K26 large turbo features:
- An oversized aluminium billet hi-flow compressor wheel with extended tip height
- A carefully profiled and polished compressor cover to maximise charged air efficiency
- An upgraded 360-degree thrust kit for improved reliability at higher boost loads
- An enlarged shaft and cut-back turbine blades to enhance exhaust flow and reduce restriction
- Full VSR balancing and fast-road calibration
The hybrid BV39 small turbo includes:
- An oversized billet high-flow compressor wheel for sharper spool
- Precision-machined compressor housing designed for maximum efficiency
- A stepped gap performance piston ring to improve sealing and longevity
- Full VSR balancing for optimal smoothness
Together, these upgrades deliver a balanced and highly effective twin‑turbo solution tailored specifically for the M57 diesel engine.
Real-World Use Cases for BMW 335d Owners
Many 335d owners look for a turbo upgrade that keeps the car practical while significantly increasing performance. This hybrid twin setup is ideal for:
- Fast-road builds that require instant torque and strong top-end power
- Daily‑driven vehicles that need reliability as well as performance
- Drivers wanting a clean, efficient boost curve with minimal lag
- Diesel enthusiasts aiming for 450+ bhp power figures
- Owners replacing tired or failing OEM turbos with a high-performance alternative
The turbochargers are engineered to offer stronger response without sacrificing smoothness, making them perfect for both commuting and spirited weekend driving.
Compatibility and Fitment
This hybrid biturbo upgrade kit is designed for the following models equipped with the M57D30 engine:
- BMW E90 335d Saloon (2006–2010)
- BMW E91 335d Touring (2006–2010)
- BMW E92 335d Coupé (2006–2010)
Part numbers for reference: 5326-970-0004 and 5439-970-0089.
Order Options and Professional Support
There is no exchange service for this product. A remanufacture option is available, meaning you send in your existing turbochargers for hybrid conversion. Support is available for arranging collection and logistics.
Professional fitting can be carried out at MJ Modifications in Warwickshire. This ensures that the installation, setup, and calibration are performed correctly to maximise performance and reliability.
Why Choose This Hybrid Twin Turbo Kit?
For BMW 335d owners who want more power without sacrificing driveability or reliability, the BMW 3 Series 335d E90 E91 E92 E9x 3.0 Diesel M57D30 Hybrid Twin Turbo Upgrade Kit stands out for several reasons:
- Stronger, cleaner boost delivery from modern billet compressor technology
- Improved transient response for better real‑world acceleration
- Durability enhancements such as upgraded thrust bearings and piston rings
- OE‑level refinement due to VSR balancing
- Workshop‑tested and trusted on customer builds
Whether you are replacing ageing turbo units or building a high‑performance diesel project, this kit delivers exceptional value and proven results.
Final Thoughts
The M57D30 engine is one of BMW’s most respected diesel powerplants, and the right turbo setup can unlock its full potential. The K26/BV39 Billet Biturbo Set offers a powerful, reliable, and road‑friendly solution capable of over 450 bhp while remaining smooth, responsive, and usable every day. If you’re searching for a performance diesel upgrade that transforms your BMW 3 Series 335d, this hybrid twin turbo kit is one of the best options available.