3.5-inch normally closed vacuum valve

Specification:
Pressure: about 1 BAR
The valve type : Closed
Starting Type: Positive Pressure
Material: 304 Stainless steel
Fit for 3.5″ Exhaust Piping
Feature:
1. Universal 3.5″ boost actuated exhaust valve.
2. Made of high quality 304 stainless steel,high strength and reliable, wear resistance and anti-corrosion. It’s durable to use, and can maintain a long service life.
3. No installation guides are included, we highly recommend seeking professional installation.
4. This boost activated exhaust dump valve is closed in the free state.
5. This will require cutting and welding onto the exhaust; not a direct bolt-on item.
6. Professional installation is strongly recommended.