ECU File Service · Slovenia, EU · ISO 9001

Real power. Proven on the dyno.

The ECU file service for professional tuners — every file developed in-house and proven on our 4×4 dyno. Live support while you're at the car, 7 slave tools supported, CSS-approved dealers in 20+ countries.

Open the file portal See file prices
Every file dyno-tested 5 free files for new dealers ISO 9001
Live gains checker

What will your car make?

Pick your vehicle — real stock vs tuned power & torque from our tuning database, drawn live on a dyno sheet.

Live from our tuning database — 190+ makes, 10,000+ engines.

0+Countries with CSS dealers
ThousandsVehicles optimised every year
ISO 9001Certified quality system
4×4The only single-axle synchronised dyno in Slovenia
7Slave tools supported
File services

Every file, dyno-developed — not copied.

Upload the read from your slave tool, get back a file developed in-house and proven on our 4×4 rollers — with live support while the car is on your lift.

Car Tuning Files

Stage 1 & Stage 2 for petrol and diesel — developed in-house, dyno-proven, delivered ready to flash.

€75–120

DSG Gearbox Files

DSG Stage 1 — faster shifts and raised torque limits to match the engine file.

€75–120

Truck & Agricultural

Stage 1 for commercial and agricultural machines — torque under load and measurable fuel savings.

€150

Emissions Solutions

EGR, DPF, AdBlue, NOx and lambda solutions — clean, tested files for every common system.

from €60

Options & Extras

Start/Stop, Vmax, swirl flaps, decat, DTC off, immo solutions, BMW sport display and more.

from €20

Back to Stock

Original file restore for any vehicle we've handled — whenever you need it.

FREE
Upload your file in the portal →
Transparent pricing

Pay per file. 1 point = €1.

Top up your account by PayPal or bank transfer and pay per file with points. All files developed in-house and tested on our dyno.

Tuning files

  • Car — Stage 1€75–120
  • Car — Stage 2€75–120
  • DSG gearbox — Stage 1€75–120
  • Truck — Stage 1€150
  • Agricultural — Stage 1€150

Emissions

  • EGR off€60
  • DPF off€75
  • AdBlue off€75
  • NOx off€75
  • Lambda / O2 off€60

Options

  • Swirl flaps off€60
  • Start/Stop off€60
  • Vmax off€60
  • Decat€60
  • BMW sport display€60

Extras

  • Immo off€75
  • DTC off€20
  • Back to stockFREE
  • Live support at the carIncluded
  • New dealers5 free files

Prices in EUR, excl. VAT — 1 point = €1 in the portal. Open the portal or ask us about anything not listed.

Top up & order in the file portal →
Dyno proof

Don't take our word. Watch the rollers.

Real runs, real numbers, filmed in our tuning centre. More on our YouTube channel.

Start your own tuning business

Slave tools, dealer-ready packages.

Official dealer packages — every kit includes the unit with cables, live tech support, a training course, 5 free files and a 1-year subscription.

Bench & OBD

bFlash

€2,900 excl. VAT

  • Unit + full cable set
  • Training course included
  • 5 free tuning files
  • 1-year subscription
Ask about bFlash
Most popular

Alientech KESS V3

€2,000 excl. VAT

  • Unit + full cable set
  • Training course included
  • 5 free tuning files
  • 1-year subscription
Ask about KESS V3
Bench & boot

MagicMotorsport FLEX

€2,500 excl. VAT

  • Unit + full cable set
  • Training course included
  • 5 free tuning files
  • 1-year subscription
Ask about FLEX
OBD

FlashTech CMD

€2,150 excl. VAT

  • Unit + full cable set
  • Training course included
  • 5 free tuning files
  • 1-year subscription
Ask about CMD
CSS-approved dealers

Your workshop. Our engineering.

Join dealers in 20+ countries who read the car, upload the file and let CSS handle the tuning. Every file dyno-proven, live tech support while you're at the vehicle, and new dealers get 5 free files to start.

  • 7 slave tools supported
  • Real-time tech support while you work
  • Training course for you and your team
  • All files developed & tested on our dyno
Open the file portal Become a dealer
Start your own tuning brand

Your brand out front. Our engineers behind it.

Become a CSS sub-dealer and get your own white-label portal — your name, your logo, your prices. You bring the customers; our engineers tune every file behind the scenes. No tools, no software, no risk.

Your own branded portal

A complete white-label tuning portal under your name and logo. Your customers order from you — they never see us.

We do the tuning

Every file is built and dyno-proven by CSS engineers behind the scenes — you deliver work you could never make alone.

Your customers, your margin

You set your own prices and keep the customer relationship. You pay wholesale, sell retail — the margin is yours.

Live in days, no tools

No equipment, no software, no experience needed. We set up your portal and you start selling tuning under your own brand.

YOU — Sub-dealer Your branded portal Your customers · your prices · your logo
CSS — Master We tune & dyno-test Flash-ready file back · same day
Your customer Gets the tune Under your brand, backed by our dyno
Become a sub-dealer →
Start now

Ready to send your first file?

Create your account, upload the read from your slave tool, and get a dyno-proven file back — usually the same day. New dealers get 5 free files.

Open the file portal Become a dealer
Questions

Straight answers.

Are your files custom-made or from a database?

Developed in-house. Files are built and proven on our own 4×4 dyno with electromagnetic load simulation — that's how we know the numbers before you flash the car.

Which slave tools do you support?

Seven different slave tools are supported. We're also official dealers for bFlash, Alientech KESS V3, MagicMotorsport FLEX and FlashTech CMD — see the packages above if you're still choosing your hardware.

How do payments work?

Simple credit system: 1 point = €1. Top up by PayPal, or by bank transfer and we add the points to your account. You pay per file — no subscription required.

What if the customer wants the original back?

Back to stock is always free. We keep the originals, so a restore file is one request away — whenever you need it.

How do I become a CSS dealer?

Get in touch and we'll set up your portal account. New dealers get 5 free files to start, a training course, and live tech support while you're at the vehicle. If you need hardware, our dealer packages include everything.

Contact

Book your tune or talk to us.

Call, message or drop by — we'll tell you honestly what your car can gain and what it costs.

Opening hours

  • Monday – Friday07:00–11:30 & 12:00–15:00
  • Saturday – SundayClosed

Quick enquiry

Tell us the car and what you want from it — we reply within one working day.

Or just WhatsApp us — fastest during working hours.