In any of the LSA Lid Spacers, Magnuson Tub Spacers, or 1" head plates, we can add nozzle ports for nitrous oxide or methanol systems. Nitrous nozzles are 5/16"-18 thread and methanol is 1/8"NPT thread. Billet spacers are drilled and tapped, the phenolic versions have brass inserts epoxied into the material for strength. Head plates require 8 ports, where the lid and blower spacers can use 4 or 8 ports. If you are doing head plates, or 8 ports on the spacers, make sure you add TWO to your cart, as they are sold in 4 port packages!!!!