3 Inch 304 Stainless Steel Exhaust Rain Cap with Gravity Counterweight Flap for Truck Exhaust Stack

Product Overview A vertical exhaust stack on a working truck is an open chimney. This 3 inch 304 stainless exhaust rain cap closes that opening with a gravity flapper that lifts under exhaust pressure and drops back the moment the engine stops. The 76 mm inlet slides over a standard 3 inch stack and locks with a stainless clamp band. The shell and flap are formed from 304 stainless steel rather than aluminised mild steel, which matters on trucks that run winter roads treated