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25% Off Online Orders of Select Parts and Accessories. Enter Promo Code FOUND25 in Cart

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25% Off All Online Orders of Select Parts and Accessories
Receive 25% Off Your Online Purchase. Use promotional code FOUND25 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 2/27/17. Online orders scheduled for in-store pick up must be completed by closing on 2/26/17 for discount to apply.

Free Shipping on Orders Over $50 or in-store pickup

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  • Part #: 619|
  • SKU: 947000

Available today

Pay in Store Available

    • Deep Big Rig Sound: 2x louder than a factory horn
    • One-Piece patented design requires no hoses
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

Wolo Big Bad Max Air Horn

If you want a deep sounding powerful air horn sound, go no further, Big Bad Max is the horn for you! They will hear you before they can see you! Trade kit includes a heavy-duty 30-amp relay, mounting bolt and instruction in English and Spanish.
  • Deep Big Rig Sound: 2x louder than a factory horn
  • One-Piece patented design requires no hoses


Rated 1 out of 5 by 1 reviewer.
Rated 1 out of 5 by Total Junk This horn is absolute trash. It did not work as advertised and was a complete waste of time installing. After finding out that it was not going to work I had to uninstall it and find another horn to replace it with. Don't waste your time or money on this junk. It is sad that Pep Boys would market such a poor product. October 28, 2016
  • 2017-01-22 T14:14:57.672-06:00
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