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This 3.5-inch normally open, vacuum-close exhaust valve from Stainless Bros is built from 304 stainless steel for durability in larger exhaust systems. It defaults open and closes when vacuum is applied, offering selectable exhaust flow control for 3.5-inch piping setups. Use it where vacuum-actuated closure is preferred for tuning sound or backpressure characteristics.
Stainless Bros 3.5in SS304 Exhaust Valve Normally Closed w/Boost Open
