Custom Performance Tuning in Jefferson, GA + Remote Tuning Nationwide

DD84 Performance Engineering by Down Dirty 84 LLC provides vehicle-specific ECU calibration, remote tuning, standalone EFI support, diagnostics, and performance solutions for supported GM, Holley EFI, Dodge/Hemi, Ford, Toyota/Lexus, swap, cammed, and boosted applications. Based in Jefferson, Georgia, we serve Greater Atlanta and Northeast Georgia with remote tuning available nationwide for supported platforms.

Choose Your Tuning Service

Remote Tuning

Get a vehicle-specific calibration without traveling to the shop. DD84 reviews your supported setup, prepares the calibration, analyzes data logs, and refines revisions using real operating data.

In-Person & Mobile Tuning

Street-based calibration and diagnostic support for supported vehicles in Jefferson, Northeast Georgia, and select surrounding areas.

Diagnostics & Programming

ECU diagnostics, PCM communication troubleshooting, wiring diagnostics, programming support, no-start investigation, and swap diagnostics for supported applications.

Common Questions

What types of vehicles do you work on?
We work on a wide range of vehicles, including cars, trucks, and motorcycles.

How long does the tuning process take?
The tuning process typically takes a few hours, depending on the complexity of the vehicle and the services required.

Do you offer warranty on your services?
Yes, we offer warranty on our services to ensure customer satisfaction and peace of mind.

Start Your DD84 Intake

Tell us about your vehicle, current setup, goals, and service needs. We will review the details and direct you to the appropriate next step for your supported application.

DD84 Performance Engineering

DD84 Performance Engineering by Down Dirty 84 LLC is based in Jefferson, Georgia. We provide ECU calibration, diagnostics, PCM programming, standalone EFI support, and mobile service throughout Northeast Georgia and Greater Atlanta, with remote tuning available nationwide for supported platforms.