4th Gear Performance

Located in Dallas, GA and serving the Atlanta metro, this specialty auto performance shop focuses on Nissan, Toyota, and Honda platforms. The operation pairs deep brand knowledge with a practical, results-driven approach, delivering tuning, parts installation, and maintenance under one roof. As an authorized installer for Z1 Motorsports, the shop combines trusted products with proven installation practices, offering enthusiasts a path to real-world gains without the guesswork.

Core tuning and diagnostics

• Custom ECU tuning to maximize horsepower and torque while preserving driveability
• Pre-dyno inspections to establish a reliable baseline and confirm gains
• Data-logging and tuning adjustments for street and track use

Performance parts and professional installations

• Extensive aftermarket catalog spanning steering, suspension, intake, exhaust, superchargers, and turbochargers
• Brake-system upgrades and optimized fuel delivery for reliability and efficiency
• Precise component installations and seamless integration with existing drivetrains
• Routine maintenance services including oil changes, brake inspections, and fluid checks

From diagnostic work to bespoke tuning programs, the shop emphasizes clear communication and transparent pricing, helping you plan upgrades that fit your budget and goals. Situated in the Dallas area, it serves the Atlanta region with a focus on Nissan, Toyota, and Honda enthusiasts seeking high-value performance improvements.