HP Tuners Ballenger AFR500 Air/Fuel Ratio Monitor

The Ballenger Motorsports AFR500 Air Fuel Ratio Monitor has proven very successful. In a world where cost-cutting reigns supreme, we’ve kept the calibration quality air fuel ratio meter made by ECM going strong. Previously sold as the NGK Powerdex AFX, it was replaced in the NGK/NTK product line due to high cost and low margins despite its popularity. Sometimes quality comes at a price, and we plan to keep offering this high quality product to consumers, dedicated tuners, and industry professionals.