BMW 335d F30 F31 F34 (2012-2018) N57D30 3.0d Hybrid Twin Turbo Upgrade Kit – The Ultimate Diesel Performance Boost
The BMW 335d is already one of the most capable performance diesels on the road, but for drivers who want significantly more power, sharper response and greater tuning potential, the BMW 335d F30 F31 F34 (2012-2018) N57D30 3.0d Hybrid Twin Turbo Upgrade Kit offers a major leap forward. Built in the UK and proven on fast‑road and enthusiast builds, this uprated bi‑turbo pair transforms the 3.0d engine into a genuinely high‑performance package capable of delivering 460+ bhp with the right supporting modifications.
This article explains what the hybrid turbo upgrade is, how it works, and why it has become one of the most sought‑after BMW diesel performance upgrades for F‑Series 335d owners.
What Is the BMW 335d Hybrid Twin Turbo Upgrade?
This hybrid turbo kit replaces the factory turbochargers on the BMW 335d N57D30 engine with a fully redesigned and uprated pair of UK‑built units. Unlike standard replacement turbos, hybrid units use larger and more efficient billet compressor wheels, CNC‑machined housings and upgraded internal components to increase airflow, raise power potential and maintain reliability under higher boost pressures.
The kit includes both the large high‑pressure (HP) turbo and the smaller low‑pressure (LP) turbo. Together, they deliver rapid spool from low rpm and strong, sustained airflow at the top end. This combination makes the kit ideal for road cars, fast‑road builds and daily drivers that require OEM‑like smoothness but significantly more performance.
Key Technical Features of the Upgrade
The BMW 335d F30 F31 F34 (2012-2018) N57D30 3.0d Hybrid Twin Turbo Upgrade Kit offers a range of engineering improvements over the stock turbochargers.
- UK‑built hybrid biturbo pair with in‑house machining and assembly
- VSR balancing for OE‑grade smoothness and long‑term reliability
- Fast‑road calibration, ideal for tuned street‑driven diesel builds
Large turbocharger highlights:
- K27 billet aluminium compressor wheel with extended‑tip design for higher mass flow
- CNC‑machined compressor cover with optimised airflow channels
- 360‑degree thrust bearing for enhanced durability under elevated boost
- Fully VSR balanced for precision and performance
Small turbocharger highlights:
- Upsized BV40 billet compressor wheel for faster spool and improved low‑rpm torque
- Profiled and polished compressor housing for maximum flow efficiency
- Stepped‑gap piston ring for excellent sealing and longevity
- VSR balanced and set to fast‑road specification
What This Turbo Upgrade Does for Your BMW 335d
When installed and accompanied by the correct tuning and supporting hardware, this hybrid turbo kit dramatically changes how the N57 diesel engine performs. Drivers can expect quicker throttle response, more usable torque across the entire rev range, and a huge increase in top‑end power.
One of the biggest advantages is airflow. The larger billet wheels allow the engine to move more air at any given rpm, which directly translates to more power when tuned. At the same time, the improved bearing systems and precision balancing ensure the turbos operate smoothly and reliably, even under demanding conditions.
With proper setup, owners can achieve over 460 bhp and substantial torque gains, making this one of the highest‑value performance upgrades available for the 335d platform.
Real-World Benefits for Car Owners
Whether you use your 335d daily or as a fast‑road project, the hybrid turbo upgrade delivers a range of practical advantages:
- Stronger acceleration from low rpm thanks to the enlarged small turbo
- Massive midrange punch ideal for overtaking and spirited driving
- High‑rpm airflow that prevents power drop‑off near the top end
- More efficient compressor design for cooler charge air and better combustion
- Improved durability compared with ageing factory turbos
- Future‑proofing for additional tuning upgrades such as intercoolers, downpipes and remaps
For daily drivers, this means smoother, more responsive performance. For enthusiasts, it unlocks the headroom needed to push the N57 engine to its true potential.
Why Choose This UK‑Built Turbocharger Pair?
BMW diesel engines respond extremely well to turbo upgrades, but quality is essential. The BMW 335d F30 F31 F34 (2012-2018) N57D30 3.0d Hybrid Twin Turbo Upgrade Kit is built by specialists who machine, assemble and VSR balance each unit in‑house. This ensures consistent quality and reliability, backed by strong customer feedback from real‑world fast‑road builds.
Reasons enthusiasts trust this kit:
- Proven performance gains with verified dyno results
- Exceptional throttle response and drivability
- Billet compressor technology for improved airflow
- Durable bearings and upgraded internal components
- Designed specifically for the F‑Series 335d and N57D30B engine
Fitment and Installation Information
This turbo kit fits all BMW 335d F30, F31 and F34 models from 2012 to 2018 with the N57D30 engine. Part numbers covered include 5326‑970‑0010, 5440‑970‑0013, 5326‑970‑0015 and 5440‑970‑0026. Installation should be carried out by a specialist familiar with BMW diesel turbo systems to ensure correct setup, leak checking and calibration.
Professional installation and software calibration are recommended. For expert fitting, MJ Modifications in Warwickshire offers turbo installation and setup services, with booking available via info@mjmodifications.co.uk.
Who Should Buy This Hybrid Turbo Upgrade?
This upgrade is perfect for drivers who:
- Want significantly more power from their 335d without sacrificing drivability
- Are building a fast‑road or tuned daily‑driven diesel
- Need better airflow for custom remaps and larger supporting mods
- Prefer UK‑built, high‑quality performance parts
- Seek a reliable solution to ageing or failing OEM turbochargers
Conclusion
The BMW 335d F30 F31 F34 (2012-2018) N57D30 3.0d Hybrid Twin Turbo Upgrade Kit is one of the most effective and proven ways to transform the performance of the 3.0d N57 engine. With billet compressor wheels, precision balancing, UK engineering and power potential beyond 460 bhp, this uprated bi‑turbo pair offers exceptional value for drivers who demand more from their diesel BMW.
Whether you're after sharper throttle response, greater tuning flexibility or simply the thrill of a faster and more capable 335d, this hybrid turbo kit delivers outstanding results backed by engineering you can trust.