Moroso 22637 - Vacuum Relief Valve, 3/4 In - 16 Thread

Billet Aluminum Vacuum Relief Valves 0.75 -16 Thread Adjustable Threaded Directly Into Manifold • 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 Part # AVAILABLE OPTIONS 68791 Clamp On Breather, 1" I.D.