The TTE390 is a performance turbo upgrade for VAG 1.8T 20V engines, developed by TheTurboEngineers and based on a heavily modified BorgWarner K04-064 unit. This setup is designed for high flow, lower back pressure and strong top-end performance, with 390+ hp proven (with the correct hardware and tuning).
You can choose either a new replacement turbo or send in your own original K04-064 (in good condition) for an upgrade. Please note: this is not a plug-and-play upgrade for the 1.8T. Modifications and customisation are required.
Advantages
• Proven to deliver 390+ hp on the 1.8T (with the correct setup)
• Large TTE billet compressor (2871X) for high efficiency and flow•
K16 high-flow turbine for lower back pressure and lower EGT•
CNC silencer delete for reduced restriction and improved
flow• 360° Motorsport bearing kit for durability under heavy
load• VSR high-speed balanced up to 250,000 rpm, including balance
certificate• Choice: new turbo or upgrade of your K04-064
Technical specifications
• Basis: OEM BorgWarner K04-064 housings/components (depending on choice)
• Compressor: TTE 2871X billet next-gen
geometry• Turbine: BorgWarner K16 (cut/high-flow)
• Bearing assembly: TTE 360° Motorsport bearing kit•
Modifications: CNC-machined compressor housing (optimised tolerances)
• Flow upgrade: CNC silencer discharge delete•
Balancing: components + CHRA VSR high-speed (up to 250,000 rpm)
• Documentation: balance test result document included•
Required: software
recalibration• Installation: not plug-and-play; fabrication/modification
required• Origin: Made in Germany
Compatibility
Suitable for VAG 1.8T 20V engines in, amongst others:
• Audi A3 / S3 / TT (1.8T 20V)
• Volkswagen Golf / Bora / Passat (1.8T 20V)
• SEAT Leon (1.8T 20V)
• Škoda Octavia (1.8T 20V)
Please note: exact fitting depends on your manifold/Downpipe/pipes. This product requires customisation, so please check your vehicle’s setup beforehand.
Contents
• TTE390 upgrade turbo (new or upgraded, depending on the option selected)
• Balance test result document (numbered)
Frequently asked questions
Is this turbo plug-and-play on a 1.8T?
No. This is a high-end upgrade requiring fabrication, modification or custom parts.
Do I need a tune?
Yes. Software recalibration is required to drive safely and realise the full potential.
Can I send in my own turbo?
Yes, provided it is an original BorgWarner K04-064 and is in good technical condition.
Delivery time
• New turbo: 3–6
working days• I’m sending in my old turbo: 20–40 working days
