moroso vacuum relief valve, billet aluminium, natural, 3/4-16in. thread, each

Billet Aluminium Vacuum Relief Valve, Shim-able Spring Style, 3/4-16 Thread Two styles allow fastening through valve covers (No. 22637) or threaded directly into lifter valley (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 works with any vacuum level They are made of 6061 T6 Billet Aluminium and have a clear, attractive finish *Not legal for sale or use on pollution-controlled vehicles