TTE500 BMW N54 Hybrid Twin-Turbo Upgrade Kit – Bolt-On Direct-Fit Replacement Turbochargers for 135i 335i (1 Series/3 Series) by TheTurboEngineers | 2 Inch Inlets | Fast Spool, 500PS Potential | E8x/E9x

Transform your BMW N54 with a premium hybrid twin‑turbo set engineered for response, reliability and real-world pace

Looking for a serious step up in performance without compromising drivability on your BMW 135i or 335i with the N54 engine? This TTE500 hybrid twin‑turbo set is a direct replacement that retains the factory‑style housings while delivering rapid spool, strong midrange and dependable top‑end. Built in Germany by TheTurboEngineers, it is a bolt-on upgrade that pairs perfectly with 2 inch intake pipes for maximum flow.

We have installed these at MJ Modifications and the feedback has been superb. Throttle response is crisp, torque comes in early and stays strong, and the build quality is exactly what you expect from a top-tier German manufacturer. Customers love the blend of daily drivability and serious pace.

Why enthusiasts choose this hybrid twin‑turbo upgrade

• Next-gen billet compressor geometry for efficient airflow and strong power per psi
• Specially optimised turbine design for fast spool and sustained performance
• Upgraded bearing pack for durability under hard use
• Genuine actuators for consistent control
• Optional upgraded wastegate hardware, including flappers, arms and bushing
• Direct-fit installation using the original-style housings, requires 2 inch inlets
• Circa 500 PS potential with excellent response
• Supplied with a serial-numbered balance test document
• Made in Germany, proven TheTurboEngineers quality

Precision balancing for longevity and smooth operation

Each unit is balanced in multiple stages. Individual components are first balanced at low speed up to 2,800 rpm, then the assembled CHRA is high-speed VSR balanced in multiple planes up to 250,000 rpm. The result is exceptional stability, refined acoustics and long-term reliability that surpasses typical OEM standards. Every turbocharger ships with a unique balance report for complete peace of mind.

Optional upgraded wastegates

Add the TTE wastegate upgrade for refreshed flappers, arms and bushing. Ideal if you want tighter control and to address wear on ageing hardware. Note: product images may show units with standard wastegates.

Fitment

• BMW N54 twin‑turbo applications such as 135i and 335i
• Direct replacement using OEM-style connections
• Requires 2 inch intake pipes

Search-friendly terms to help you find the right upgrade

BMW 135i turbo upgrade, BMW 335i turbo upgrade, N54 hybrid turbos, N54 twin turbo replacement, direct bolt-on turbochargers, billet compressor wheel, uprated bearing chra, high-speed VSR balanced turbos, German engineered turbo set, 2 inch inlets N54, performance turbo kit for BMW 1 Series and 3 Series, wastegate upgrade option for N54.

Professional fitting

Want it installed properly the first time? Book professional fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote.

Model: TTE500