Exhaust Flapper-External 3 1/2" and 4"
Designed to clamp over most exhaust tips, our external flappers are constructed from high temp rubber and DO NOT use an internal metal plate which could cause failure. Measure the outside diameter of your exhaust tip to determine the size needed. Sold individually (Tip not included). Fits 4" or 3-1/2" diameter tips (3 1/2" requires slight modification of flap to fit).