Performance In-Frame Tuning

536 Soscol Ave. Napa, CA 94559 (707) 253-0748

Monday - Friday: 8:00 am - 5:00 pm

High Performance Tuning

Performance In-Frame Tuning provides tuning and repair services for EFI-controlled systems only.
No traditional carburetor tuning or repair services.


AJ is the owner/operator of AJ's Auto Repair/Performance In-Frame Tuning.
A second generation Napa native, his natural ability to diagnose problems and his ease with people make him exceptional. As a racing family, peak automotive performance, not only repairs, are a family motivation. His breadth of knowledge from EFI / ECU and auto electronics, to suspension, brakes, tires, and of course make AJ a true outlier in the industry.