Racebox

Nothing but a downpipe, flexfuel kit and custom tune… 😮‍💨 489 whp/577 wtq on E45 🌽

This Supra was dropped off for a quick Spool Performance downpipe and MHD Tuning flexfuel kit install before we put it on the dyno for a same-day DME unlock and our custom flexfuel tune! (Free DME unlock with a custom tune btw 😉)

Dyno results:
-Stock: 386whp/402wtq
-Low Boost 93: 395whp/426wtq
-High Boost 93: 424whp/473wtq
-Low Boost E45: 462whp/509wtq
-High Boost E45: 489whp/577wtq

That’s an additional +103whp and +175wtq with only two modifications and our custom tune 💪

Even on stock turbo cars, we setup a multimap for even more control! For this Supra, we dialed in a low & high boost feature that retains full flexfuel capability all through your dash🫡

Ready to unlock the potential of your Supra or B58 powered BMW? Contact us today 😉

📲 (832) 786-9038
📩 [email protected]

Custom tuned by Racebox ♾️ via MHD

Happy Labor Day weekend from us at Racebox! 🇺🇸

We’ll be closed Monday, September 7th for Labor Day and will resume normal business hours to following Tuesday, September 8th.

All calls, messages, emails and orders will be resumed when we’re back in the shop.

Enjoy the long weekend and we’ll see you Tuesday! 🥂

Who said you can’t have fun on 93? 😮‍💨

This brand new matte blue 2026 BMW G87 M2 came in making 454whp/426wtq on the stock tune with only a midpipe installed 🔥

Since we have our own AutoTuner here at the shop, we were able to unlock its DME in house, strap it to the dyno and tune it all in the same day!

The Stage 2 OTS map made a solid 554whp/493wtq, but after dialing in our custom 93 tune specifically for this G87, it left making 580whp/531wtq 💪

That’s an additional +26whp/+38wtq over the OTS map and a total gain of +126whp/+105wtq over the stock tune!

Dyno results:
-Stock tune: 454whp/426wtq
-Stage 2 OTS: 554whp/493wtq
-Custom 93 tune: 580whp/531wtq

DME unlocking is FREE with the purchase of any custom tune 🔓S58 starting at $850!

Ready to unlock your BMW’s hidden potential? Contact us today to get started!

📲 (832) 786-9038
📩 [email protected]

Tuned by Racebox ♾️ via MHD Tuning

Who said you can’t have fun on 93? 😮‍💨

This brand new 2026 BMW G87 M2 came in making 454whp/426wtq on the stock tune with only a midpipe installed 🔥

Since we have our own AutoTuner here at the shop, we were able to unlock its DME in house, strap it to the dyno and dial in our custom 93 tune all in the same day! It left making 580whp/531wtq, a gain of +126whp and +105wtq from just a custom tune 💪

Dyno results:
-Stock tune: 454whp/426wtq
-Custom 93 tune: 580whp/531wtq

DME unlocking is FREE with the purchase of any custom tune 🔓

Ready to unlock your BMW’s hidden potential? Contact us today to get started!

📲 (832) 786-9038
📩 [email protected]

Tuned by Racebox ♾️ via MHD Tuning

Not your average downpipe + tune Supra 😆😮‍💨

This beautiful Matte White A91 comes from the factory with a 6 speed manual, and stopped by the shop for a quick downpipe install + our custom Flex Fuel tune!

While it already had a few modifications installed before we got to work, this is a great example of what a healthy stock turbo B58TU is capable of with just a little bit of ethanol 🌽

Dyno results:

- Custom 93: 420whp / 424wtq
- Custom E45: 485whp / 539wtq

Limited by the stock clutch, we had to leave things a bit conservative. The tune has a medium power map the customer can switch to that keeps torque even lower if the high power map slips the clutch!

Ready to unlock the potential of your B58? Contact us today 😉

📲 832-786-9038
📩 [email protected]

Mod list:
- Spool Performance downpipe
- MHD Tuning flexfuel kit
- HKS®︎ charge pipe + BOV
- RK TITANIUM intake
- RK TITANIUM single exit catback

Custom tuned by Racebox ♾️ via MHD Tuning

New YouTube Video is LIVE! 🎥🎞️ Link in bio!

As some of you might know, we’ve been abusing our A90 Supra for years now…

After accomplishing multiple 4.xx second 60–130 runs on the stock motor, which is still healthy, we finally managed to wear out our very old Pure Stage 1 transmission.

With our new goal of turning this car into a 7 second Supra, we took the opportunity to upgrade the transmission once again, this time to a much beefier Spool Performance Stage 3 setup that should be capable of handling well over 1,000whp from our blackmarketrace raptor turbo kit!

Now that the transmission is fixed and finally back on the road with a 7275 from Turbosmart, it’s time to start piecing together the rest our biggest project yet. We already have some of our favorite parts ready to go on the car, including a new built engine from O2uned , a ford 8.8in rear end conversion from Seems Legit Garage, LLC , an entirely new fuel system from Spool Performance , and MUCH more that we can’t wait to show you.

This is only the beginning.

Link in bio to watch Episode 2! Make sure to subscribe and follow along as we chase our first 7 second pass. Each major modification will get its own installation video, and by the end of this series, we want to show you guys exactly what it takes to build an A90 Supra capable of running 7s in the 1/4 mile

Q60 putting down 621whp & 534wtq with a STOCK catback exhaust 😵‍💫

That’s right! We just wrapped up another upgraded turbo VR30 here at the shop, but this Q60 took a slightly different approach than the white one we just posted!

This time around, the goal was to build a reliable 600+whp daily driver! After the car was shipped to us from Oklahoma, we immediately got to work on the teardown and installed a set of Z1 VRX70B turbos along with the supporting fuel upgrades needed to take full advantage of them.

In Oklahoma, 91 octane is much common than 93, so we provided this customer with a conservative low boost 93 map that’s safe enough to run on 91. However, add a splash of ethanol and a quick map switch, and this stock engine Q60 puts down significantly more power!

Unfortunately, with the stock catback exhaust still in place, we decided 621whp was a good place to stop. There’s definitely more left on the table with these turbos, but the goal was a reliable daily driver, not an all out dyno number.

Dyno results:
- Low boost 93: 422whp / 436wtq
- Medium boost E50: 578whp / 503wtq
- High boost E50: 621whp / 534wtq

Mod list:
- 𝗭𝟭 𝗠𝗼𝘁𝗼𝗿𝘀𝗽𝗼𝗿𝘁𝘀 VRX70B turbos
- 𝗭𝟭 𝗠𝗼𝘁𝗼𝗿𝘀𝗽𝗼𝗿𝘁𝘀 intakes
- 𝗭𝟭 𝗠𝗼𝘁𝗼𝗿𝘀𝗽𝗼𝗿𝘁𝘀 heat exchanger
- Spool Performance upgraded HPFP
- Spool Performance upgraded DI injectors
- Spool Performance bucketed LPFP + flex fuel
- FDPs
Tuned by Racebox ♾️ via EcuTek Technologies

Ready to take your VR30 powered Nissan or Infiniti to the next level of performance? Contact us today to get started!

📲 (832)786-9038
📩[email protected]

If you want to see some 700+whp VR30s we’ve tuned on these same turbos, check out some of the recent builds on our page and YouTube!

489whp & 513wtq on 93 octane with ZERO modifications! 🔥

We’re excited to officially announce that we’ve developed the world’s first VR35 flash tune available to customers!

A lot of you actually watched our initial YouTube video where we unlocked the ECU with autotunerusa and began the tuning process. We ended that video making roughly 418whp, but that was only the beginning of the tuning process.

Since then, we’ve built our own datalogger from scratch specifically for the QX80 and its new MG1 ECU. The result? An additional +126whp and +102wtq!

Dyno results:
- Stock: 363whp/411wtq
-Custom: 489whp/513wtq

The VR35 flash tune is available for customers now and can be purchased directly through our website!

Another QX80 YouTube video is already in the works, so make sure to checkout our channel! We’re going to show you exactly how we made 489whp/513wtq on the dyno from start to finish.

And if you want to tune your VR35-powered Nissan or Infiniti, contact us today to get started:

📲 (832) 786-9038
📩 [email protected]

464whp & 491wtq Q50RS finished in Black Opal 😮‍💨

This week on the dyno, we dialed in another stock turbo VR30 on pump gas & ethanol! With the right supporting mods, we were able to put down an additional +121whp & +134wtq over stock! 💪

Dyno results:
- Stock: 343whp/357wtq
- Custom 93: 424whp/462wtq
- Custom E30: 464whp/491wtq

Mod list:
- Spool Performance FDP’s
- MBRP 3” catback exhaust
- Boosted 6 Autowerks flexfuel kit
- 𝗭𝟭 𝗠𝗼𝘁𝗼𝗿𝘀𝗽𝗼𝗿𝘁𝘀 heat exchanger
- Auxiliary coolant tank w/pump controller
- AMS intakes
- AMS single LPFP upgrade
- HKS BOV’s
- Catchcan

Custom tuned by Racebox ♾️ via EcuTek Technologies

Looking to get the most out of your VR30? Contact us today for assistance with parts, installation, or tuning!

📲(832)786-9038
📩[email protected]