Kleinn Model 401 Dual Round Roof Mount Air Horn, Chrome

The Kleinn Model 401 is a dual round roof mount air horn in chrome-plated stainless steel for pickups, work trucks and SUVs with onboard air. It's universal and gives you the classic semi-truck look and sound.

The set includes the dual chrome horn assembly (15.5" x 7.5" x 4.5"), a 1/4" compression fitting for the underside air inlet, and mounting hardware with a pre-fit pad. Kleinn rates it at 152.1 dB at 150 PSI.

Because the air enters from below, the airline runs through the roof instead of across it, which gives you a clean install with no exposed tubing. It's a good fit for work trucks and haulers where you want a horn that people hear and that looks the part.

This is the horn only. You'll need an air system with a 120-175 PSI cut-off and at least a 1.5-gallon tank, a valve (Kleinn offers 12V electric and manual chain or lanyard pull options), and 1/4" airline. For new installs, Kleinn requires its 330 roof mount fitting pack, sold separately. Kleinn's 6270, 6275 and 6350 air systems are compatible. No model-specific install guide is published.

Want a single big trumpet instead? The Model 411 (round) and 412 (rectangular) are single 25" roof horns. 1-year limited warranty.