Take Your Modified BMW S58 to the Next Level
For BMW G8X M2, M3, M4 and F9X X3M, X4M owners who already have the itch for performance modifications, the EuroWerke ‘Full E85 - Modified PLUS’ Upgrade Package is the next logical step. Designed specifically for the mighty BMW S58 engine, this package transforms an already modified car into a flex-fuel or full E85 powerhouse.
If you’ve already had your DME unlocked in the past, we only require a coding update - saving you time and money while opening the door to serious gains.
Why E85 for the S58?
Switching your S58 to E85 isn’t just about chasing dyno numbers (though the gains are massive). It’s about unlocking a balance of power, safety, and reliability:
- More Power - huge increases in rwkW and Nm.
- Safer & Cooler - reduced temps under heavy load.
- Flex-Fuel Ready - run on 98, E85, or anything in between.
- Cleaner Burn - less carbon build-up, more long-term reliability.
What’s Included in the Modified PLUS Package
This upgrade builds on the groundwork of your existing modifications, adding the critical components required to safely run full flex-fuel or pure E85:
- Femto DME coding update
- REV2 Controller by bootmod3 - IP66 polycarbonate enclosure, race harness, flex fuel sensor sub-harness
- bootmod3 Flex Fuel Kit - with high-flow or PR 360 fittings
- bootmod3 10Bar Fuel Pressure Sensor
- bootmod3 License
- Precision Raceworks Fuel Rail
- Bosch 1000cc Injectors
- Tune+ Custom ECU Re-Tune for full E85
E85 Performance Packages: Modified PLUS vs. Stock to Not
Already modified? The Modified PLUS package is the step-up for enthusiasts who’ve already installed key upgrades like downpipes or intakes and now want to unlock the true potential of E85. Unlike the Stock to Not package, which equips everything from scratch for standard cars, the Modified PLUS package assumes your car already has a baseline of upgrades in place - saving you money and avoiding duplicated parts.
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:
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Stock to Not is the all-in-one solution for standard cars.
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Modified PLUS is tailored for cars already running performance hardware but ready for the next stage.
Tested & Proven at Eurowerke
Not all G8X and F9X models are the same - early builds and LCI updates come with small differences in setup. That’s why every Modified PLUS package is tailored to your car’s specific build and modification list.
We’ve tested this exact setup extensively on our own development cars and customer builds, including the G81 M3 Competition producing over 600rwkW on E85. The results speak for themselves: explosive power with a smooth, refined delivery you can rely on every day.
Ready to Upgrade?
If you’re already modified and hungry for more, the Modified PLUS Package is your chance to experience what full E85 can do for your S58. Speak to the Eurowerke team today to discuss your current modifications and how we can tailor this package to suit your car.
👉 Learn more about our E85 builds here: Full Flex Fury G81 Case Study
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.
