Pro Fogger Custom Nitrous Plumbing Kit, Includes 13716NOS Nozzles & 18048RNOS Solenoids - Plumbing kits are offered for those needing only the components related to the intake manifold plumbing of a direct port injection kit. Proper quantities of nozzles, lines, jets, and appropriate fittings are included. Plumbing kits are also available in “show” version with polished lines, distribution blocks and chrome solenoids (if included in part number).