Racebox

Racebox Performance Tuning Shop located in Houston, Texas. We specialize in the VR30, B58, S58 and more!
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Heat is one of the biggest enemies of the VR30, and when you compare the factory heat exchanger to an upgraded one, it’s...
05/22/2026

Heat is one of the biggest enemies of the VR30, and when you compare the factory heat exchanger to an upgraded one, it’s easy to see why this is such an important mod. And, with summer right around the corner, swapping the OEM setup for something like this is crucial! Mishimoto’s heat exhanger is easily one of the best performance upgrades you can do.

A common questions we get is: “Do I need a retune after upgrading the heat exchanger?” Short answer: no.

As charge air temps rise, the ECU starts pulling timing to protect the engine. Upgrading the cooling system helps delay heat soak and keeps temps under control for longer, meaning the car can maintain its performance for longer in the heat with fewer corrections. Once you start turning the boost up, you generate even more heat, which makes cooling upgrades even more important for tuned cars in the summer. Even on a bone stock car untuned, this is an excellent upgrade!

If you’re planning to push your VR30, a heat exchanger should be high on the mod list. I mean seriously… look how tiny the factory one is 😆

Want to keep your VR30 alive and well this summer? Be sure to hit us up to get your cooling system ready for the heat! Parts, installations, and tuning all available under our roof

📲: (832)786-9038
📩: [email protected]

All the bells and whistles on this Q50 🫡 After installing the customer provided T51R mod, we threw this bagged and boost...
05/21/2026

All the bells and whistles on this Q50 🫡 After installing the customer provided T51R mod, we threw this bagged and boosted Q50 on the dyno to dial in his custom 93 tune + flash our custom TCM tune!

Super simple setup that made exactly what we expect! A lot of people kept asking for a full mod list on the last reel with this car, so here’s what you’ve been waiting for + full dyno graph!

Results:
447whp & 476wtq

Mod list:
- B6A Shorty intakes
- ARK Catback exhaust
- FDP’s
- Upgraded heat exchanger
- OEM Compressor housing with T51r mod from
- Airlift suspension

ECU tuned via Ecutek + TCM tune

Ready to take your VR30 to the next level? We offer parts, installation, and tuning for these cars all under the same roof 🫡 Contact us today!

📲 (832) 786-9038
📩 [email protected]

730whp X3M! Perfect family car 😆  

From 93 up to full E85, all it takes is a simple tune! All of our stock turbos flex ...
05/19/2026

730whp X3M! Perfect family car 😆 

From 93 up to full E85, all it takes is a simple tune! All of our stock turbos flex fuel tunes are dialed in to run up to full E85 without upgrading the fuel system, but we never really demonstrated the power difference between 93, E45, and E85. With an influx of requests to run full E85 on stock fuel systems recently, we figured it’s the perfect time to show y’all on our dyno!

Steven is back once again, and this time with his X3M for some quick installs and tune. With a very simple setup, even retaining the stock downpipes, it put down very impressive gains over stock!

Dyno results:

Stock- 445whp/464wtq
93- 595whp/575wtq
E45- 729whp/701wtq
E85- 689whp/635wtq

Mods:

- MAD front mount intakes
- MAD midpipe
- TRP flex fuel kit

DME unlocked via 🔓 
Custom tuned on .tuning 

Want to get the most out of your X58? Hit us up for DME unlocks, parts installs, and custom tuning!

📧: [email protected]
📱: (832)786 9038

S58s with three pedals like God intended 🙏Want your G8X to keep putting power down the way it should? These two M3s alre...
05/15/2026

S58s with three pedals like God intended 🙏

Want your G8X to keep putting power down the way it should? These two M3s already tuned by us came through for PTB clutch upgrades, we dropped the transmission on both and got them sorted with twin disk setups that can actually handle the power. We always recommend an upgraded clutch if you want to surpass mid 5xx wtq range on our dyno, since the stock unit starts to slip under hard abuse. Both of these cars can now be turned up more, and ready for anything else we want to throw at them! 🫡

Thinking about a clutch upgrade in your manual S58, or other performance upgrades? Hit us up!

📞 (832) 786 9038
📧 [email protected]

406whp and 453wtq on stock downpipes with only 2 mods 🫡This 2024 6M/T Nissan Z came in with just a Stillen catback exhau...
05/13/2026

406whp and 453wtq on stock downpipes with only 2 mods 🫡

This 2024 6M/T Nissan Z came in with just a Stillen catback exhaust and Z1 intakes, and left the dyno making an additional +59whp & +95wtq after a custom 93 octane tune 😮‍💨

Strong numbers on a simple setup, and it only gets better when you’re banging gears in the manual 🔥

Is your Z stock or heavily modified? Either way, we can take your build further. Parts, installs, and tuning are one call or email away 😉

📲 (832) 786-9038
📩 [email protected]

764whp and 594wtq 🔥 Stock engine and transmission Q50Already equipped with an upgraded fuel system and flex fuel from th...
05/08/2026

764whp and 594wtq 🔥 Stock engine and transmission Q50

Already equipped with an upgraded fuel system and flex fuel from the last visit, this Q50 was ready for more power! After installing the VRX70B turbos and dialing in our custom flex fuel tune, it responded exactly how we expected. Just like many of the Z1 turbos VR30 setups we’ve built, this one comfortably cleared 700+whp. 😈

Dyno results on E50 🌽:

-Low boost: 546whp 509wtq
-Medium boost: 671whp 570wtq
-High boost: 764whp 594wtq

Custom tuned on 💻

From basic bolt ons to full frame turbos, building fast VR30s is what we do every day. Ready to level up your Q50 or Q60? Contact us to get your VR30 dialed in ✅

📧 [email protected]
📱 832 786 9030

Mod list:
- VRX70B turbos 🐌🐌
- intakes
- full downpipes
-Racebox 3 inch true dual catback
-Omni 4 bar TMAP sensors
-AMS stage 3 HPFP
-AMS dual LPFP
-AMS stage 3 injectors
-AMS heat exchanger
-AMS intercoolers
-AMS flex fuel kit

Custom tuned on

Another day, another Z in the shop 😏With only 3,200 miles on the dash, this customer stopped by to get his exhaust setup...
05/07/2026

Another day, another Z in the shop 😏

With only 3,200 miles on the dash, this customer stopped by to get his exhaust setup dialed in the right way 🫡

Already equipped with a full AWE catback, we finished things off with resonated LDP’s to clean up the tone and give the car the aggressive sound it was missing 🔥

Need help dialing in your Z? Contact us today for your installs & tuning!

📲 832-786-9038
📩 [email protected]

NEW Stock Engine VR30 Record 🔥 885whp/707wtqgtr just put down an impressive 885whp and 707wtq on his stock engine VR30, ...
05/06/2026

NEW Stock Engine VR30 Record 🔥 885whp/707wtq
gtr just put down an impressive 885whp and 707wtq on his stock engine VR30, resetting the previous record held by us during a remote tuning session .

, the quickest VR30 in the world, previously held this record at 825whp/674wtq and is still running the same stock engine.

Want to take your Infiniti or Nissan to the next level? Contact us to get started! Parts, installation, & tuning all available under ONE roof ✅
Mod list:
- turbo kit w/ Garrett G25-550
- 3.5” FDP + Dumps
- Port injection kit with 1300cc injectors
- Level10 Built transmission

Tuned by Racebox on 🔒

05/04/2026

The Racebox Q&A 🫡

You guys asked some GOOD questions on our story… so we sat down and answered all of them 😏

We cover everything from performance upgrades and tuning to the behind-the-scenes of what we do and how we approach each build.

No music or filler, just real answers from people who actually work on these cars and tune them under the same roof ✅

Full video is live on YouTube! Link in bio 🎥

If you’re ready to take your build to the next level, hit us up!

📩 [email protected]
📲 832-786-9038

Port injection for the VR30 made simple 🫡 YouTube link in bioWith all the hype around PI, we put together a full breakdo...
04/27/2026

Port injection for the VR30 made simple 🫡 YouTube link in bio

With all the hype around PI, we put together a full breakdown showing you exactly what you need to run port injection the right way plus the benefits vs upgraded DI

We cover everything from unboxing and installing the complete PI kit, to real dyno results on VRX80B turbos 👀

Ready to unlock your VR30’s full potential? Let’s get your setup dialed in the right way—contact us today

📩 [email protected]
📲 832-786-9038

🎥 Full video live now
Link in bio

+221whp and +222wtq over stock 😮‍💨This G80 came in making 485whp, and after installing a few basic bolt-ons paired with ...
04/23/2026

+221whp and +222wtq over stock 😮‍💨

This G80 came in making 485whp, and after installing a few basic bolt-ons paired with our custom flex fuel tune, it’s leaving making over 700whp 🔥
Easy gains that we’ve proven time and time again.

Ready to turn your stock G80 into a 700whp daily driver? Contact us today.

📩 [email protected]
📲 832-786-9038

Mod list installed:
- catted downpipe
- midpipe + stock muffler
- flex fuel kit
- intakes
-Carbon front grilles & ducts
- oil cooler cover

DME unlock via
Custom tuned on .tuning

Parts, install, and tuning - all under one roof here at 🫡

Address

Houston, TX

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 5pm
Thursday 9am - 6pm
Friday 9am - 6pm
Saturday 12pm - 3pm

Telephone

+18327869038

Website

https://youtube.com/@goracebox?si=qcidD29VOmFDWN7_

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