Big Dawgs Toyota Tuning is a veteran-owned, authorized Overland Tailor Tuning (OTT) retailer based in Tennessee. We have been tuning Toyota and Lexus vehicles since 2021, both online for customers nationwide and in person across Middle Tennessee and Western Kentucky. Our focus is simple: help you get increased throttle response, smoother shifting, and stronger, more consistent power out of your rig.

We do three main things: Tune OTT pre-tuned ECUs and COBB Accessport devices & have them shipped to your door, give guidance on bolt-on performance upgrades like turbo and supercharger kits, and offer in-person tuning appointments in Tennessee and Western Kentucky. Whether you want a simple plug-and-play tune or a full custom option, we can point you in the right direction.

OTT, or Overland Tailor Tuning, is a tune built specifically for Toyota and Lexus vehicles. Instead of a generic map, an OTT tune reworks your factory ECU calibration to improve throttle response, transmission shift logic, and overall drivability.

It depends on the option you choose. With a pre-tuned ECU, we mail you an ECU that is already calibrated for your vehicle, and you simply swap it in & mail yours back. With a COBB Accessport V3, you flash the tune yourself using the handheld device. Prefer a hands-on approach? Book an in-person appointment and we will handle everything for you. Orders ship quickly with tracking so you know exactly when to expect them.

All three get you a proven OTT tune. A pre-tuned ECU is the easiest plug-and-play route. A COBB Accessport V3 lets you flash tunes and monitor live data yourself, and it doubles as a gauge and datalogger. In-person tuning is best if you want us to dial everything in and update your software on the spot. Not sure which fits your goals? Reach out and we will help you choose.

We tune a wide range of Toyota and Lexus platforms, including the Tacoma, 4Runner, Tundra, Sequoia, and Land Cruiser, plus supported Lexus models. We add new platforms regularly, so if you do not see your vehicle listed, contact us. There is a good chance we can tune it or have support on the way.

Drivers notice increased throttle response, smoother and smarter transmission shifting, and stronger power delivery right away. Actual gains depend on your vehicle, fuel, and any bolt-on upgrades. On turbocharged platforms, a tune paired with supporting mods can unlock serious power.

Yes. Along with tuning, we carry bolt-on performance hardware including turbo and supercharger upgrades for supported Toyota platforms. Pairing a tune with the right hardware is the best way to safely add real power. Message us and we can help you plan a build around your goals and budget.

OTT tunes are built around real-world drivability and dependable daily use, not just peak numbers. Toyota owners run these tunes every day on daily drivers, tow rigs, and off-road builds. As with any modification, we recommend staying on top of maintenance and running the correct fuel for your calibration.

Yes. We ship OTT pre-tuned ECUs, COBB Accessports, and performance parts to customers across the country. If you are local to Tennessee or Western Kentucky, you also have the option to book an in-person tuning appointment.

Because tunes and electronics are calibrated to your specific vehicle, returns are handled on a case-by-case basis. If something is not right with your order, contact us and we will work with you to make it right.

Absolutely. We stand behind every tune and build. If you have a question before, during, or after your purchase, reach out through our contact page and we will help you get sorted. Real support from people who actually drive and tune these trucks.

Easy. Browse the shop to find your vehicle and tuning option, or head to our contact page and tell us about your truck and what you are after. We are always happy to guide you in the right direction, whether you are tuning online or in person.