Click on one of the Frequently asked Questions (FAQs) to see the answer

Although both versions of the gauge have the same integrated digital display, the way these gauges obtain data from you vehicle is different. The Boost Gauge is a gauge that reads boost/vacuum and battery voltage using its own integrated analog sensor. The Multi-Gauge plugs into your vehicle’s OBD2 port and communicates with the ECU to pull data for all of its values.
The gauges are designed to make installation as simple as possible. The length/difficulty of install will somewhat depend on your ability/skill level and which version gauge you choose. The P3 Cars Boost gauge takes 30-60 minutes to install in most cases. The P3 Cars Multi-Gauge takes 5-30 minutes to install in most cases.
The Boost Gauge has its own dedicated sensor that mechanically reads boost directly from your vehicle’s charge pipe/intake manifold, so it is always reporting the exact pressure of your intake/charge pipe. The Multi-Gauge pulls data directly from your vehicle’s ECU, so it is reporting the exact values your ECU sees.
The function of our Boost gauge is not affected by any tunes/mods in any way. For the Multi-Gauge in virtually all cases, ECU flash tunes have no effect on the accuracy of it’s readings. With “piggy-back” style tunes that intercept sensors, the boost readings can appear lower than the actual value because your ECU is being “tricked” by the tune. The add-on analog boost sensor or Boost Gauge solves this problem.
The gauge can be configured to display units in English, Metric or a combination of both.
(see configuration page for more details)
No. Since the gauge is only reading information from your ECU and not controlling anything, it does not void your vehicle’s warranty. If you are still concerned, installation of nearly every one of our models is also 100% reversible with no damage caused to your vehicle.
The Boost Gauge cannot be upgraded. For the Multi-Gauge, the software can be upgraded via the software chip in the control box. Any software upgrades we offer are available on our accessories page on our website.
The Multi-Gauge alone does not require any additional parts for installation. Depending on what model vehicle you have, our add-on analog boost sensor and our Boost Gauge may require a boost tap to provide a fitting to connect your gauge’s tubing kit to your vehicle’s intake manifold/charge pipe.