BMW B58TU M340i/Toyota Supra MHD Tune

BMW B58TU M340i/Toyota Supra MHD Tune

$500.00 USD
$500.00 USD
Shipping calculated at checkout

Elevate the performance of your BMW M340i or Toyota Supra equipped with the B58TU engine through Racebox’s MHD tuning solution. This advanced ECU tune is engineered to unlock significant horsepower and torque gains, refine throttle response, and optimize fuel efficiency, providing a more dynamic and responsive driving experience. With customizable tuning maps, you can tailor your vehicle’s performance to match your driving style, whether for daily commuting or spirited driving.

Key Features:
• Increased Power Output: Experience substantial boosts in horsepower and torque, unleashing the full potential of your B58TU engine.
• Improved Throttle Response: Enjoy quicker and more precise acceleration, enhancing overall drivability.
• Customizable Tuning Maps: Select from multiple performance maps to suit various driving conditions and preferences.
• Optimized Fuel Efficiency: Benefit from improved fuel consumption without compromising on performance.
• Professional Support: Access expert assistance and regular updates to ensure your tune remains current and effective.

Racebox’s MHD tune integrates seamlessly with your vehicle’s existing systems, offering a reliable and efficient performance upgrade.

One Stop Shop Get it all in one place
The BEST Service 24-48 hour responses
The FASTEST Cars Many platform records

The Racemode Advantage

The Racemode Advantage: An Overview

Tailored Performance Calibration for BMW Platforms: Racebox specializes in custom performance calibrations designed specifically for your BMW, taking into account your unique modification list and preferred fueling options, including 91+ Octane and E-85 compatible fuel systems. For those using Racebox OTS (Off-The-Shelf) calibrations, your modifications are considered within the bounds of pump gasoline (non-ethanol fuels). Our meticulous engine tuning ensures optimal performance, maintaining OEM-level drivability and reliability.

Benefits of Racemode Tuning

  • Enhanced Throttle Responsiveness and Drivability: Leveraging our extensive experience with hundreds of BMW tunes, we've developed a calibration that boosts throttle responsiveness and reduces lag inherent in stock ECM mappings.
  • Rigorously Tested: Our tuning strategies have been honed over years, starting with our personal G80 M3, G20 M340i and A91 Supra test vehicles. Through a combination of dyno testing and real-world scenarios, we ensure our calibrations meet the driving conditions our customers will face, enhancing performance and reliability continuously.
  • Precision Ignition Timing for High Octane Fuel: By optimizing engine timing for high-quality fuel, we extract maximum power safely and efficiently.
  • OEM Safety Limiters Retained: We maintain and enhance OEM fail-safes within the ECU calibration, closely monitoring operation parameters to ensure drivetrain reliability, adjusting fail-safes to protect against the increased power output.

Additional Features

  • Speed Limiter Removal: The ECU's vehicle speed limiter is deactivated, allowing for higher top speeds.
  • Improved Fuel Efficiency: Our calibrations optimize fuel adjustments, potentially improving fuel efficiency with aftermarket intake and exhaust systems. Note: Increased throttle use may offset these gains.

Tune at Home with ECUTEK Phone Flash

Convenience at Your Fingertips: With ECUTEK's Phone Flash software, tune your vehicle using just your smartphone from the comfort of your home. We provide comprehensive instructions and data logging support for our custom tuning services. This feature allows the majority of our remotely tuned customers to enjoy the benefits of Racemode tuning without the need to visit a shop or dyno.

Racebox is committed to delivering performance enhancements that respect your vehicle's integrity while pushing its capabilities to new heights. Enjoy the thrill of optimized performance with the peace of mind that comes from professional, experienced tuning.

Refunds and Returns

The sale of any RACEBOX Racemode Tuning product or service is final at the moment of checkout. RACEBOX will adhere to an “all sales are final” policy unless there are circumstances that, in the sole and absolute discretion of RACEBOX, make a return or refund appropriate.

BMW B58TU M340i/Toyota Supra MHD Tune
BMW B58TU M340i/Toyota Supra MHD Tune

Tune Type: Custom Stock Turbo Gasoline

BMW B58TU M340i/Toyota Supra MHD Tune

What Makes Racebox Special

Our humble beginnings

Racebox was conceptualized when our founder Hussain Boxwala was trying to purchase a tune for his VR30 powered Q50 back in 2018. When speaking with tuners, he realized that there was a need for clear communication, honest work, and prompt response service. In an effort to create the best customer experience possible, Hussain set out to develop his first Q50 calibration on his personal vehicle.

100% Honest Marketing

Our main goal is to provide customers with the most realistic expectations for their vehicles. This means we'll never lie about the mods on our shop cars, the times they run, or the power they make. We aim to always provide the most information possible, like listing ambient conditions and correction factors on all dyno charts. We're not here to push an agenda, we're here to help you achieve your goals.

World-class Customer Support

There's nothing more frustrating than waiting weeks for a reply from your tuner, which is why we'll never take longer than 48 hours to get back to you. Often times, it's same day replies. We know you value your time, and so do we. We're reachable via phone, text, or e-mail, and we'll never leave you hanging :)

Racemode Tuning FAQ

We've curated a list of the most common questions y'all have when reaching out to us. Please see the cards to the right for some of the more frequent ones.

What is B58TU Racemode Tuning?

B58TU Racemode Tuning isn’t just a tune—it’s a statement. Our proprietary calibration takes your B58TU-powered BMW M340i or Toyota Supra 3.0 to the next level. With insane horsepower gains, neck-snapping torque, and throttle response so sharp it feels like an extension of your foot, this is how you dominate every road and track.

Is B58TU Racemode Tuning safe for my ride?

Safe? Absolutely. Reliable? 100%. We don’t just throw numbers at the dyno and call it a day—we fine-tune your setup to perform like a beast without sacrificing your engine’s health. Reliability and power go hand-in-hand when Racebox is behind the wheel.

Which vehicles can run B58TU Racemode Tuning?

If it’s got a B58TU under the hood, it’s game on. That means BMW M340i, M440i, Z4 M40i, and the Toyota Supra 3.0. You’re in the right place.

What kind of power are we talking here?

For a B58TU, we’re talking about unlocking up to 80-100 WHP and 100-120 WTQ over stock with an OTS tune. With a custom tune and supporting mods, you’re looking at 100+ WHP and 120+ WTQ, transforming your car into a serious performance machine.

What’s the difference between OTS and Custom Tunes for the B58TU engine?

The difference comes down to personalization and power. Here’s the breakdown:

OTS (Off-The-Shelf) Tunes:

• Pre-configured maps designed for quick installation.

• Ideal for stock or lightly modified B58TU engines (e.g., upgraded downpipe or intake).

• Includes two maps (daily and sport) with basic launch control.

• No revisions or customization—flash it and you’re good to go.

• Perfect for drivers looking for instant, reliable power gains without the hassle of logging or fine-tuning.


Custom Tunes:

• Tailored to your specific setup and performance goals.

• Supports advanced modifications like ethanol blends (E30/E85), upgraded turbos, HPFP/LPFP, and more.

• Includes map switching (e.g., high-boost, low-boost) and advanced launch control.

• Requires data logging and multiple revisions for optimized performance.

• Ideal for enthusiasts pushing their B58TU to the limit and wanting every ounce of power.

Which tune should I choose for my B58TU?

It depends on your setup and goals:

• If you’re running stock or lightly modified, go with an OTS tune for easy, reliable power gains.

• If you’re chasing big numbers or running advanced mods, Custom is the way to go.

Can Racemode handle ethanol blends like E30 or E85?

Hell yes. If you’re running E30, a flex-fuel kit gets you there. For E85 (anything over E50), we’ll need to upgrade your HPFP, LPFP, and slap on that flex-fuel kit. Ethanol is the cheat code for unlocking next-level power, and we tune it like pros.

Does the tune come with launch control and map switching?

Of course. Custom tunes include launch control, plus map switching so you can go from daily driver to track assassin at the push of a button.

Do I have to visit the shop for Racemode Tuning?

Nope. You could be in Houston or halfway across the globe—we’ve got you covered. All you need is an MHD WiFi adapter, a smartphone, and an internet connection. We’ll walk you through the whole process like you’re here with us..

What do I need to get started with Racemode Tuning?

Here’s your checklist:

• MHD WiFi adapter.

• A solid smartphone or laptop (Windows OS for advanced options).

• A good internet connection.

• Any mods already installed before the first flash—don’t leave us guessing.

How long does the tuning process take?

On average, 6–10 business days. How fast we finish depends on how quickly you respond and send logs. Custom tuning is a team effort—don’t ghost us, and we’ll get you ripping down the road ASAP.

What if I run into issues during the process?

Problems? Not a chance—just solutions. Call us at (832) 786-9038 or hit us up on the email thread you’re already in. Attach your data logs, DTC codes, and any details, and we’ll get it sorted. You’re not alone in this.

Can I tweak the tune later?

While we don’t include lifetime updates for modifications, you can always pay for a retune if your setup changes. If the changes are minor and within the first month—like adding certain mods we already support—we’ll update it for free. Just reach out, and we’ll let you know what qualifies.

Will this void my warranty?

It depends on your dealership, and let’s face it, some are chill, and some aren’t. They’ll need to prove the tune caused an issue to void your warranty. Pro tip: we give you a stock file to flash back before you roll into the service bay. Talk to your advisor and play it smart.

How do I keep my B58TU running strong after tuning?

Maintenance is everything when you’re running tuned. Stay on top of your oil changes (high-quality synthetic only), swap those spark plugs regularly, and keep an eye on fluids like coolant and transmission oil. Also, invest in an upgraded intercooler—it’s a no-brainer for keeping temps in check when you’re pushing serious power.

How fast do you respond?

Fast. We aim for a 24-48 hour turnaround during business days. Custom tunes often see daily revisions unless we’re slammed, in which case it’s closer to 48. Either way, you’ll never be left hanging—no ghosting, no weeks of waiting. That’s not how we roll.

What mods do I need to run Racemode Tuning?

None, technically. Racemode Tuning delivers power gains even on stock setups. But if you want to go all-in, start with a high-flow downpipe, free-flowing exhaust, and upgraded intake. The more you bring to the table, the harder we can push.

What if I’m new to the tuning game?

First things first: get your car up to date with basic maintenance (fluids, spark plugs, filters). Once that’s dialed in, start with the essentials—intercooler, exhaust, and intake. Call us if you need advice—we’ll steer you right.

What if I’m not local to Houston?

No big deal. We’ve tuned thousands of cars worldwide without ever meeting the drivers in person. As long as you’ve got the gear (MHD adapter, phone), we can bring Racebox-level performance to you.

You might also like

chevron_left chevron_right