Spectre's Vacuum/Sensor Adapter Kit attaches vacuum lines almost anywhere on the intake tube. This kit includes (2) hole saws, (6) grommets and (12) fittings to fit all popular vacuum line and air sensors and is for use with Spectre's modular intake systems where vacuum hoses are required. All Spectre's air intake components are designed and built using high quality materials and engineered for optimum fit and function. Installation Instructions