Moroso Billet Aluminum Vacuum Relief Valve, 3/8" NPT

• 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 aluminum and have a clear, attractive finish

*Not legal for sale or use on pollution-controlled vehicles