Your Vehicle
BMW 8 serie GC 840i 340hp
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Stage 1: file 100 € online + installation 700 € at the workshop (on the bench) Book now
Power HP
Torque Nm
Buy the Stage 1 file, pay the installation at the workshop
100 € VAT included: the file developed for your engine, paid online
Installation: 700 € network price, the workshop may charge less, paid at the chosen workshop (on the bench) · terms
Power Graph
BMW 8 serie GC 840i 340hp: da 340 a 400HP
Remapping BMW 8 serie GC
MasterTuning develops remapping for BMW. La BMW 8 serie GC 840i 340hp può passare da 340 HP a 400 HP con un incremento di 60 HP.
The development of each remap is customized by MasterTuning.
- 100% customised files with lifetime warranty
- Reference values for Stage 1: the file is developed on your vehicle and checked in the workshop
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details BMW 8 serie GC 840i 340hp
The BMW 8 serie GC 840i 340hp is equipped with a petrol engine that produces 340 HP and 450 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this BMW can achieve 400 HP (+18%) and 580 Nm (+29%).
Our Stage 1 tuning for the 8 serie GC 2019 -> delivers an impressive gain of +60 HP and +130 Nm, optimizing the petrol engine's performance while maintaining reliability and staying within safe parameters.
The engine code B58B30 identifies this specific powerplant configuration. The Bosch MG1CS201 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
With 340 HP from factory, this BMW 8 serie GC is already a performance vehicle. Our remapping extracts even more potential, delivering exhilarating acceleration and enhanced driving dynamics for enthusiasts who demand the best.
Technical Specifications — BMW 8 serie GC 840i 340hp
Factory technical data for the BMW 8 serie GC 840i 340hp (2019 ->), used by MasterTuning engineers to develop a remap tailored to this specific powerplant. Figures shown are reference values for Stage 1; the file is developed on your vehicle and checked in the workshop.
| Engine code | B58B30 |
|---|---|
| ECU / Control unit | Bosch MG1CS201 |
| Fuel | Petrol |
| Compression ratio | 11.0 |
| Bore × stroke | 82.0 X 94.6 mm |
| Stock power | 340 HP · 450 Nm |
| Remapped power (Stage 1) | 400 HP (+60) · 580 Nm (+130) |
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your BMW 8 serie GC.
Frequently Asked Questions - BMW 8 serie GC
How much power can I gain from remapping my BMW 8 serie GC?
With MasterTuning Stage 1, your BMW 8 serie GC 840i 340hp can gain +60 HP (from 340 to 400 HP) and +130 Nm of torque. This represents a 18% increase in power.
Which ECU does the BMW 8 serie GC 840i 340hp use?
The BMW 8 serie GC 840i 340hp uses the Bosch MG1CS201 engine control unit. MasterTuning recalibrates this ECU for Stage 1 and Stage 2.
What is the engine code of the BMW 8 serie GC 840i 340hp?
The engine code of the BMW 8 serie GC 840i 340hp is B58B30. You can find it in the vehicle documents or on the engine plate.
Is ECU remapping safe for the BMW 8 serie GC engine?
Yes, MasterTuning's remapping for the BMW 8 serie GC 840i 340hp is developed within safe parameters. Each file is developed on your vehicle, checked in the workshop and stays within the mechanical limits of the B58B30 engine.
Is the BMW ECU remapping reversible?
Absolutely. The original factory calibration of your BMW 8 serie GC is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my BMW warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
Other Remaps You Might Like
Other Engines BMW 8 serie GC 2019 ->
Similar Power BMW
Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
Request Quote on WhatsAppYour data is safe. No spam, just your quote.