Check the listing for details. 554-162 2 Axis G-Meter. Condition: New, Made in US. Listed at 449.95 USD. X and Y Axis G-Meter. Introducing the Holley EFI 2 Axis G-Meter. Designed to be stable in the harshest environment. Co-designed with RACEPAK, this G-meter would be a perfect fit for your four digit horsepower drag radial machine or an autocross corner carver. The G-meter features both X and Y axis outputs. The X axis registers from a negative 3 G (deceleration) to a positive 12 G (acceleration). The Y axis registers +/-7.5 G. In order to ensure the installation is simplified, the ECU pins come pre crimped. Loose pins are also provided if the cable needs to be shortened for clean installations. This can also be used with non-Holley ECU's as long as they're are (2) 0-5V analog inputs available.. The unit can be mounted using Velcro, which helps dampen vibrations, or mounted solidly. The unit.