Gillis Power Band Tuning
Is your vehicle not giving you what you need? Do you need more towing power, improved fuel mileage, or quicker quarter-mile results? Our tune-up instructions and parts are built to deliver practical gains.
Power, Mileage, Response
Automotive Tuning That Works in the Real World
Need more pull for towing, sharper throttle response, or better fuel economy? Gillis Performance offers proven powerband tuning methods, mobile tune-up service, and do-it-yourself kits.
Do-It-Yourself Tuning Kits
Increase horsepower and fuel mileage with step-by-step instructions and purpose-built components. Follow the process yourself with the same methods used in our field service.
Mobile Tuning
Onsite tune-ups using the Gillis power band method. We come to you so you can improve performance without the downtime of a shop visit.
Diesel Tuning Instructions
Instruction-based method to reset computer parameters for improved horsepower and stronger fuel economy.
Agent Opportunities
Looking to own your own automotive business? We offer agent opportunities built around proven products and repeatable service processes.