White BMW F30 340i with hood open and red engine cover in Racebox garage with neon sign
White BMW F22 M240i with hood open in Racebox garage showing B58 engine bay
745whp stock trans B58 Gen 1 PTE 6466 Racebox Tuned
800whp M240i with PTE 6670 Racebox Tuned
820whp B58 Supra with PTE 6466 Racebox Tuned
921whp B58 Supra with PTE 6870 Racebox Tuned Stock Motor
E50 FBO Racebox Tuned B58 Supra vs 93 vs Stock
chevron_left
chevron_right

BMW 240i/340i/440i/X3/X4 G01/G02/F22/F30/F32 B58 Tune

$600.00 USD
$600.00 USD
Shipping calculated at checkout
One Stop Shop Get it all done in one place!
The BEST Service 24-48 hour responses
The FASTEST Cars Many platform records

Racebox Gen-1 B58 Custom Tuning — BMW 240i, 340i, 440i, X3 & X4

Racebox has tuned over 500 BMWs on our Dynojet with real numbers — no inflated figures or correction factors. Every tune is calibrated on MHD or EcuTek for your exact car, mods, and fuel, with up to 4-way map switching and launch control included, a 1–2 business day response, and 30 days of tune revisions from your first datalog.

Gen-1 B58 Power by Stage (whp, Racebox dyno)

Setup Fuel Power (whp)
Stock — 310–350
Downpipe + tune 93 410–430
Downpipe + tune E40 470–490
Stock turbo max (+ PI) E85 500–510
Big turbo (stock block) E85 700–900+

Which tune should I pick?

  • Custom Stock Turbo Gasoline — 93 octane with a downpipe and supporting mods (410–430whp).
  • Custom Stock Turbo Flex Fuel (requires flex fuel kit) — E40 to E85, the biggest stock-turbo gains (470–490whp on E40).
  • Custom Upgraded Turbo (requires PI) — big-turbo builds, 700–900+whp on the stock block.

Proven, not promised

The B58 bottom end reliably handles 850+whp on the stock block, and Racebox big-turbo B58 builds make 700–900+whp on E85 — with hundreds of proven builds on the road. Read the full B58 Build Guide for the complete mod path.

Watch: BMW 240i/340i/440i/X3/X4 G01/G02/F22/F30/F32 B58 Tune on the dyno

More BMW tuning from Racebox

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.

Tune at Home: A Quick How-To

When you purchase a Racemode tune, you get access to our world-class customer service which includes comprehensive instructions on setting up your vehicle interface when it is received and getting started.

We have both a written set of instructions and full featured video to go over everything from setting up to flashing to data-logging.

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.

White BMW F30 340i with hood open and red engine cover in Racebox garage with neon sign
BMW 240i/340i/440i/X3/X4 G01/G02/F22/F30/F32 B58 Tune

BMW Model: F22 240i, Tune Type: Custom Stock Turbo Gasoline

White BMW F30 340i with hood open and red engine cover in Racebox garage with neon sign
White BMW F22 M240i with hood open in Racebox garage showing B58 engine bay
745whp stock trans B58 Gen 1 PTE 6466 Racebox Tuned
800whp M240i with PTE 6670 Racebox Tuned
820whp B58 Supra with PTE 6466 Racebox Tuned
921whp B58 Supra with PTE 6870 Racebox Tuned Stock Motor
E50 FBO Racebox Tuned B58 Supra vs 93 vs Stock

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 B58 Racemode Tuning?

B58 Racemode Tuning isn’t just an upgrade—it’s a transformation. Our proprietary calibration unleashes the beast in your B58-powered BMW, delivering ridiculous horsepower, torque gains, and throttle response so precise it feels like the car’s reading your mind. Whether you’re rocking an M340i, Supra, or any other B58 variant, this is how you dominate the road.

Is B58 Racemode Tuning safe for my ride?

Safe? Absolutely. We don’t play guessing games with your engine. Every tune is meticulously dialed in for reliability while delivering power that hits hard. When Racebox tunes your B58, you get the performance without sacrificing your engine’s health.

Which vehicles can run B58 Racemode Tuning?

If your ride’s got a B58 under the hood, we’re ready to tune. This includes BMW M240i, M340i, 540i, Z4 M40i, Toyota Supra (A90/A91), and other B58-powered models.

What kind of power gains can I expect from B58 Racemode Tuning?

• OTS Tune: Gains of 60-80 WHP and 80-100 WTQ over stock.

• Custom Tune: Gains of 100+ WHP and 120+ WTQ, especially with supporting mods like ethanol, intakes, or upgraded downpipes. If you’re chasing numbers, this is the tune that leaves everyone else in the dust.

What’s the difference between OTS and Custom Tunes for the B58 engine?

It’s simple: OTS (Off-The-Shelf) is the plug-and-play option, while Custom is for drivers who want their setup maxed out.

OTS Tunes:

• Pre-configured maps for stock or lightly modified setups.

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

• Flash it and go—no revisions, no logging.

Custom Tunes:

• Tailored to your exact mods and performance goals.

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

• Includes map switching, advanced launch control, and multiple revisions for optimal performance.

• Perfect for drivers who want to squeeze every last drop of power from their B58.

Which tune should I go for?

OTS tunes are great for the no-fuss crowd. If you’re running a mostly stock setup or just want a quick power bump without all the fine-tuning, OTS is your move. It’s reliable, easy, and gets the job done.

Custom tunes are for the heavy hitters—the guys and gals running ethanol, upgraded turbos, or pushing the limits of their B58. If you’re serious about extracting every bit of performance from your car, a custom tune is the only way to go.

Do I have to visit the shop for B58 Racemode Tuning?

Nope. You could be on the other side of the planet, and we’d still make it happen. All you need is an EcuTek Bluetooth module, a smartphone, and a good internet connection. We’ll walk you through the process step-by-step.

What do I need to get started with B58 Racemode Tuning?

Here’s your checklist:

• EcuTek Bluetooth module

• A solid smartphone (or a Windows laptop for the initial flash if you’re running BMW)

• 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.

Can Racemode Tuning handle ethanol blends like E30 or E85?

A: Hell yes. Ethanol is the secret sauce for serious power.

• E30: Requires a flex-fuel kit.

• E85 (E50+): Requires upgrades like HPFP, LPFP, and the flex-fuel kit.

If you’re running ethanol, we’ll fine-tune your B58 to turn heads and burn rubber.

Does the tune include launch control and map switching?

Absolutely. Custom tunes come with advanced launch control for those perfect starts and map switching so you can switch between daily driving and high-boost insanity at the push of a button.

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 maintain my B58 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 heat exchanger—it’s a no-brainer for keeping temps in check when you’re pushing serious power.

What if I run into issues during the tuning 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.

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 an upgraded downpipe, free-flowing exhaust, and larger intakes. 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—heat exchanger, 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 (Bluetooth module, phone), we can bring Racebox-level performance to you.