TTE550 BMW N54 Hybrid Twin Turbocharger Upgrade by TheTurboEngineers 135i 335i 535i Z4 35i Stock-Location Plug & Play Upgrade Service

TTE550 N54 Twin Turbo Upgrade Service for BMW 135i, 335i, 535i and Z4 35i

Important note: Part Number TTE550 has been superseded by a newer variant. Limited upgrade service and aftercare are still available for existing TTE550 units and customer supplied cores.

Transform your N54 powered BMW with a direct fit, high flow twin turbocharger upgrade engineered in Germany by TheTurboEngineers. This is the proven TTE550 specification for enthusiasts who want rapid spool, strong midrange and serious top end pull, all while retaining factory style fitment. Ideal for fast road and track day builds where reliability and response matter.

Why choose TTE550 for your N54

• Built from genuine BMW housings that are fully stripped, CNC reworked and reassembled to motorsport standards
• Lightweight, high efficiency billet compressor wheels paired with optimised compressor covers for smoother, higher mass airflow
• Enlarged two inch inlets for improved intake velocity and reduced restriction
• Curved clipped turbine and uprated shaft to lower back pressure and EGTs while keeping transient response razor sharp
• Strengthened wastegate hardware, bushings and flapper to tackle the well known N54 rattle and hold boost consistently
• Component balanced then VSR high speed balanced up to 250,000 rpm with an individual balance report included
• Around 550 PS potential with the appropriate supporting hardware, fuel and calibration
• Designed and assembled in Germany by TheTurboEngineers

Real world results

On well prepared cars with correct mapping, customers commonly report figures that back up the reputation:

• BMW 135i full bolt on, 26 psi tapering to 24 psi - 572 PS and 729 Nm
• BMW 335i - 543 PS and 821 Nm
• Up to 603 PS and 758 Nm recorded in optimum setups

Fitment and applications

Direct replacement for the twin turbo N54 platform in the following models:

• BMW E82 135i
• BMW E90 E92 E93 335i
• BMW E60 535i
• BMW E89 Z4 sDrive35i

Perfect for anyone seeking an N54 twin turbo replacement with OEM style installation, keeping factory lines and heat shields while unlocking significantly more flow.

Upgrade service process

• Send us your non damaged original N54 turbos or a suitable core set for conversion to TTE550 specification
• The listed price covers the upgrade of a serviceable core
• If inspection reveals damage or excessive wear, we will advise and quote before any additional work proceeds
• Each unit is inspected before and after the build and supplied with an engineer report and balance documentation

Installation and tuning support

Professional fitting and calibration are strongly recommended to achieve the best results. For expert installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Lead time

• Upgrade service - typically 3 to 4 weeks from receipt of your turbos
• New builds are made to order where available - typically 3 to 4 weeks from order confirmation

Warranty

One year TTE warranty.

Compatibility check

We will verify fitment before dispatch. Add your UK registration number or last seven of VIN at checkout and our team will confirm.

Why buy from MJ Modifications

We have installed and run TTE550 units on our own N54 projects and many customer cars across the UK. Feedback on drivability, spool behaviour and power delivery has been consistently excellent. Buy with confidence and let our workshop handle your build from supply to installation and mapping support.

Part number

TTE550

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