3/8" NPT

MO22636

22636

Two styles allow fastening through valve covers (Part No. 22637) or threaded directly into intake manifold (Part No. 22636) Vacuum relief point is adjustable by shimming an internal spring to get the precise amount of vacuum desired Can be disassembled for easy cleaning and maintenance and will work with any vacuum level They are made of 6061 aluminium and have a smooth, attractive finish