Unlock the True Potential of Your BMW S58
At EuroWerke Castle Hill, we’re proud to launch our new ‘Full E85 - Stock to Not’ Upgrade Package - a complete, turn-key solution designed to transform your stock BMW M car into a flex-fuel or full E85 powerhouse. Whether you’re behind the wheel of a BMW G87 M2, G80 M3, G81 M3 Touring, G82 M4, F97 X3M, or F98 X4M, this package delivers maximum power, safety, and drivability while maintaining the reliability your M deserves.
Who This Package is For?
This upgrade is tailored for standard, non-modified S58-powered BMWs. Perfect for owners who want to move straight from stock to serious performance, the package ensures your car is flex-fuel ready - meaning you can run 98 octane, full E85, or anything in between.
Why Upgrade to E85?
Switching your BMW S58 to E85 offers unmatched advantages:
- More Power - Huge dyno gains with sharper throttle response.
- Safer & Cooler - Reduced intake temps and lower cylinder pressures under load.
- Flex-Fuel Ready - Seamlessly switch between pump 98 and E85.
- Cleaner Burn - Less carbon build-up for long-term engine health.
Results? Take a look at our Full Flex Fury G81 build where we pushed past 600rwkW on E85 - all with street-friendly drivability.
What’s Included in the Package
Our carefully curated package includes everything needed for a reliable, high-performance E85 conversion:
- Femto DME Unlock - unlocks ECU for custom tuning.
- REV2 Controller by Bootmod3 - complete kit including harness, enclosure, and flex fuel sensor. Learn More
- Bootmod3 Flex Fuel Kit - with high-flow or PR 360 fittings.
- Bootmod3 10Bar Fuel Pressure Sensor
- Bootmod3 License
- Precision Raceworks Fuel Rail - View Product
- Bosch 1000cc Injectors
- NGK Spark Plugs
- O-SPEC Downpipe - choice of catted or decat.
- Pipercross Plus Drop-in Air Filter
- xHP TCU Tune - refined gearbox calibration.
- TUNE+ Custom ECU Tune - optimised for full E85 performance.
E85 Performance Packages: Stock to Not vs. Modified PLUS
Not sure which E85 package is right for you? The Stock to Not package is designed for owners of completely standard BMW M cars (G87 M2, G80/G81/G82 M3/M4, F97 X3M, F98 X4M). It provides everything you need to go from factory spec to a full E85-ready setup, including DME unlock, downpipes, intake, injectors, and tuning.
If your car already has aftermarket upgrades fitted (like downpipes, intakes, or tuning hardware), the Modified PLUS package may be the better fit - skipping duplicated parts and focusing only on the next level of fuelling, flex-fuel control, and ECU calibration.
Stock to Not vs. Modified PLUS: Which Package is Right for You?
| Feature / Component | Stock to Not (for factory cars) | Modified PLUS (for already modified cars) |
| Target Owner | Completely standard G8X / F9X M car | Previously modified M car (downpipes, intakes, etc.) |
| Femto DME Unlock / Coding | ✅ Full unlock included | 🔄 Coding update only (if previously unlocked) |
| Downpipe (Catted / Decat) | ✅ Included | ❌ Not included (assumes already fitted) |
| Air Intake / Filter | ✅ Pipercross panel filter included | ❌ Not included (assumes already upgraded) |
| REV2 Controller (Bootmod3) | ✅ Included | ✅ Included |
| Bootmod3 Flex Fuel Kit | ✅ Included | ✅ Included |
| Bootmod3 10Bar Fuel Pressure Sensor | ✅ Included | ✅ Included |
| Bootmod3 License | ✅ Included | ✅ Included |
| Precision Raceworks Fuel Rail | ✅ Included | ✅ Included |
| Bosch 1000cc Injectors | ✅ Included | ✅ Included |
| Spark Plugs | ✅ NGK Plugs included | ❌ Assumes already upgraded |
| ECU Tune (TUNE+) | ✅ Full E85 Custom ECU Tune | ✅ Custom E85 ECU Re-Tune |
| xHP TCU Tune | ✅ Included | ❌ Optional add-on |
| Goal | Factory stock → Full E85 build | Modified car → Next-level E85 upgrade |
In short:
Stock to Not is the all-in-one solution for standard cars.
Modified PLUS is tailored for cars already running performance hardware but ready for the next stage.
Real-World Performance
Not all G8X or F9X models are the same. Early builds and LCI updates mean slight differences in setup, so final dyno results will vary. That’s why every package is tuned in-house to suit your specific car. Speak to our team about what’s possible for your M.
Why Choose Eurowerke for S58 Tuning in Sydney?
We’ve made the BMW S58 platform the core of our tuning expertise. From ECU and TCU calibrations to hardware installs and track testing, we don’t just fit parts - we engineer complete solutions. Every tune and component is tested and validated on our in-house dyno and development cars, then proven again on track before being offered to our customers.
This hands-on approach means we know the S58 inside out. Backed by years of R&D and countless customer builds, we stand behind every product we fit and every tune we write. That’s why EuroWerke is Sydney’s true home for S58 tuning.
Simply put, if you own a G80, G81, G82, G83, G87, F97, or F98, there’s no better place in Sydney to unlock the full potential of your S58 than Eurowerke.
Looking for trusted European car service in Sydney? At Eurowerke Castle Hill, we specialise in BMW, Audi, Mercedes-Benz, Volkswagen, and Porsche. Our independent workshop offers dealer-level diagnostics, logbook servicing, and performance upgrades - trusted by enthusiasts across Sydney’s Hills District for more than 15 years.
