Superior Precision and Durability. Easy-to-Read DynaFact Gauge monitors turbocharger performance in diesels. Dynamically indicates boost output and allows driver to target ideal boost setting with 0-50 or 0-15 psi configurations. 1-Year Limited Warranty. Mounting systems for all of our gauges are available. Key Features: Superior Precision and Durability, Easy-to-Read DynaFact Gauge Monitor turbocharger performance, Dynamically indicates boost output, Allows driver to target ideal boost setting, 1-Year Limited Warranty Range: 0-15 psi, 2-1/16 inch diameter (52.4mm)