Grover Products Co. on Instagram: "The sound that defines firefighting for a generation came from real equipment and real engineering, not sound effects! The fire engines in Backdraft had Grover 1510 Stuttertone®️ air horns on board and this scene shows exactly why firefighters chose them. The powerful sound is unmistakable and it gives the rigs a presence that everyone on the road can feel. Fire departments around the world rely on Grover Stuttertone air horns every day to move traffic and keep