304 Stainless Steel Flapper Type Auto Spare Parts Exhaust Rain Cap for Automotive Exhaust Pipe

304 SS Automatic Flapper Exhaust Stack Rain Cap Made of premium sus304 stainless steel, this flapper exhaust rain cap delivers outstanding rust and corrosion resistance for long service life even under harsh outdoor conditions. Built-in counterweight flapper design: the flap opens automatically by exhaust gas pressure when the engine is running for smooth exhaust emission. It tightly closes once engine stops to block rainwater, snow, leaves and debris from entering the