I would not recommend buying
"I would not recommend buying this product. I hooked it up to my truck and it locked up my ECM. Had the truck towed to the dealership let's see how much this is going to cost me."
Cummins
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SKU #: BUL-40470
MPN #: 40470
Bully Dog BDX Performance Programmer 99-26 Powerstroke / 06-10 Duramax / 10-21 Cummins
Description
Unlock the full potential of your truck with the Bully Dog BDX Handheld Performance Tuner. Designed for drivers who demand more from their vehicle, the BDX delivers increased horsepower, torque, towing performance, and improved fuel economy with easy-to-install tuning. Whether you’re hauling a heavy load, conquering rough terrain, or looking for better efficiency on the highway, this powerful plug-and-play performance tuner gives you the control you need.
Drive a Ford Superduty? Enjoy preloaded support for 2020-2025 Ford F-250/F-350 6.7L and 6.7L HO Powerstroke. Custom tuning available for 2026 Superduty both 6.7L and 6.7L HO with a custom tuning dealer. All of these giving special functions for the 2023-2026 Superduty like:
Regeneration
Axle Ratio
Tire Size
TPMS
The BDX features a sleek handheld design with a full-color display and customizable gauge monitoring, allowing you to track critical engine and powertrain data in real time. Monitor vehicle parameters, adjust tuning levels, and keep an eye on performance metrics directly from the intuitive touchscreen interface.
With built-in WiFi connectivity, the BDX provides cloud-based tune delivery, ensuring your device always has access to the latest tuning updates from Bully Dog. No cables or complicated downloads required—simply connect to WiFi and stay up to date with the newest calibrations designed to keep your truck performing at its best.
Clean Air Act Compliance
All Bully Dog tuning devices are designed to comply with the requirements of the Clean Air Act and will not modify or delete factory emissions systems. Preloaded tunes undergo extensive testing to help ensure safe and reliable performance while maintaining emissions compliance. Any custom tuning created for these devices must also follow Clean Air Act guidelines.
Upgrade your truck’s performance with the Bully Dog BDX tuner and experience improved drivability, smarter monitoring, and reliable tuning backed by industry-leading testing.
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- Request quotes from local installers at checkout
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About WrenchConnected
WrenchConnected is an independent installation marketplace operating in partnership with Diesel Power Products.
How it works
After checkout, we route your vehicle info and part SKU to verified installation shops near you. Local installers review the job and submit competitive bids; you pick the shop you want based on price, reviews, and availability. Your name and email stay private until you select an installer.
Pricing
You pay for the bid from your preferred shop. The full amount is shown before you confirm — installers cannot add charges without your written consent. Payments are processed securely by Stripe.
Your privacy
During bidding, shops see only your service ZIP code, vehicle year/make/model, and the part SKU — not your name, email, or address. Only the shop you select receives your contact details after payment. We never sell your personal information.
More detail at wrenchconnected.com.
IMPORTANT NOTES:
- This product will not allow for the removal or disablement of factory emissions equipment, such as EGR (Exhaust Gas Recirculation) or DPF (Diesel Particulate Filter).
- Product is not returnable if the packaging has been opened and/or product has been installed.
- This product will support Ram truck applications with the Aisin transmission option.
- 2018+ Ram Cummins require Bypass Cable
About Bully Dog
Bully Dog Tuners
When looking to add power and fuel economy to any diesel truck, typically the first thing that comes to mind, or is recommended, is to install a diesel programmer or chip. Unbeknownst to many, adding horsepower can and WILL deliver additional MPG's, so you can basically have your cake and eat it too! But how? Simply put, unless you consistently drive aggressively, having the extra power will make the job of moving your 8,000+ pound truck easier, hence not having to work as hard.
But now, which one is right for you? Bully Dog Diesel has been in the diesel performance tuning industry since 1998 producing various Bully Dog Tuners and have gained loads of notoriety for their various devices and tunes over the years. For anyone that's been affiliated whatsoever in the industry for some time will remember the days of the Power Pup and Crazy Larry tune files that delivered unparalleled ground pounding torque. But from those days, Bully Dog Performance Chips have come a long ways in terms of tuning and the devices which carry those tunes. With intuitive tuners and monitors such as the GTX and BDX devices to tune your truck that feature WiFi connectivity for easy updates to their GTX Watchdog for gauges and diagnostic troubleshooting, and everything in between, Bully Dog Performance has a solution for every need.
And guess what, Bully Dog isn't merely limited to programmers. Seeing that the industry needed a lifetime serviceable DPF (Diesel Particulate Filter) that outflowed the factory units at a comparable price, Bully Dog went to work and released their line of Performance DPF's that allow you to have the added power you want, without all of the headaches. If Big Rigs are your thing, the Bully Dog Big Rig division is for you. With advanced tuning, turbo upgrades, manifolds, and more for Caterpillar, Detroit, and Cummins ISX, you'll gain the extra power your semi needs, plus the extra fuel economy that will deliver a nice dividend each month. Especially if you're an owner-operator that's looking to reduce expenses, the ROI on these upgrades is impressive, coupled with the fact you'll be passing the rest of the pack up those grades.
MichaelThe increase of power is noticed, BIG TIME. Very simple installation. Worth every dollar you $pend. You won't be disappointed.
Bryan
The Bullydog GT really opened up the power in my 2014 Dodge Ram 2500 cummins
NTBSOT
Great product. Simple install. Noticeable power and performance. I like the defueling, comes in handy here in Texas when it's blasted hot out and your running the heck out of the truck.
Brad
I keep the Bully Dog on my truck at all times. Never had a problem with it, and being able to change the mode with the touch of a button is awesome. Easy to install and use. Have recommended to several people.
Aaron
Easy install. Customer service was great. Having had it long but can feel the difference when towing.
Jennifer
Bullydog gt tuner works great on my 08 dodge 2500 6.7l. The power levels are perfect for what I use it for. Towing heavy loads on the tow tune are much better. The truck rarely downshifts going up hills unlike before without the tuner it would run out of power. I recommend the bullydog gt diesel tuner to anyone the a diesel truck!
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Overall rating: 3.6666667 / 5 from 3 reviews.
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Review highlights
Reviews
Perfect programmer
"I just installed the Bully Dog BDX on my 2018 Ford F-250 diesel and I love it. Very easy to use. Great instructions. Easily connects to my home WiFi from inside my garage. Perfect pre-installed tunes. Better than other tuners I have had in the past."
I would definitely buy this product again!
"Got this for my 2014 Ram 3500. Love the power my truck has now. I can feel the horsepower this product has unleashed! Only issue I had with this thing was using the unlock cable as there are no instructions on how to connect the BDX with the cable. After contacting Bullydog and speaking with a tech, installation was easy."
Q&A
- Can I switch between tunes with this? have an 04 super duty 6.0, tow a camper sometimes through mountains. Can it be switched between tow and performance or are the shift sequences the same for all the tunes this has?
- With this Bully Dog tuner you can switch between tunes, and in general if you are towing I would highly recommend being in the Tow tune.
- Will this work with a Banks Pedal Monster as well and what would the power gains be for a 2021 Tam 2500?
- There should not be any issue flashing the truck with the BDX tuner. Once tuning is complete disconnect the Bully Dog BDX and plug your Banks Pedal Monster back into your OBD2 port. -Mark
- confused, your will this work on your rig states 2010 to 2018 6.7L ram cummings, then in question you tell someone that it wont work for 2018 cummings. will this work 2108 3500 4x4 6.7l turbo cummings?
- At the time of this response, this tuner will work on the 2018 Ram 6.7 Cummins 2500/3500 with the 68RFE transmission. -Ben
- Will this change the tire size? Also does this leave a footprint and void factory warranty?
- We would need more info on what truck we are looking at using this on. Please contact our sales team at 888-993-4373 and we can look at all the specific features for your truck!
- Is it posible to change the transmission for speedo meter tire size? Also does this leave a footprint and void factory warranty? and if I require a separate cable does the entire system come with instructions?
- We would need more info on what truck we are looking at using this on. Please contact our sales team at 888-993-4373 and we can look at all the specific features for your truck!