Spectra Premium Spectra Mass Air Flow MA291 Unit is designed to Original Equipment (OE) fit, form and function requirements accomplished by leveraging Spectra Premium's OE engine management systems design expertise Platinum connector threads reduce the number of connection points for faster reaction to change Ceramic-built printed circuit boards are protected by silica gel, providing superior resistance to temperature changes and vehicle vibrations Ceramic board provides reliable voltage to eliminate engine rough-idle problems Each new sensor is road tested to ensure real world performance and to verify that each design meets Spectra Premium's high standards for quality