Black Widow 1/2" Electric Valve Kit


3 reviews

Suggested Addons
Add Gold Extended Warranty Tooltip
1 year add-on to existing warranty. Does NOT cover accidental damage, no advanced replacement.
Click here for more information!
+See price at checkout
Add Platinum Extended Warranty Tooltip
2 year add-on to existing warranty. DOES cover accidental damage and advance replacement.
Click here for more information!
+See price at checkout

Have the train horn and the onboard air system, but have no way to connect the two? With our Black Widow 1/2” electric valve kit, you get absolutely everything you need to hook-up your train horn to an existing onboard system. Our Black Widow 1/2” electric valve kit includes our Black Widow 1/2” electric valve, 17 feet of 1/2” DOT air line, 22 feet of 18-gauge grey wire, four 1/2” push-to-pull fittings and electrical terminals. Perfect for real locomotive horns such as the Nathan AirChime train horns and many more!

  • High flow 16mm orifice
  • Heavy-duty all-metal valve case
  • Designed for performance applications
  • Complete air valve kit
  • 2-year manufacturers defect warranty
  • HornBlasters Black Widow 1/2" NPT stainless steel electric air valve
  • Horn button
  • 22 feet of 18-gauge grey wire
  • 17 feet of 1/2” air line
  • x4 1/2” push-to-pull fittings
  • Electrical terminals
  • Part Number: VK-8
  • Port Size: ½″ NPT Female
  • Orifice: 16mm
  • Money-Back Guarantee/Refund Policy
    All merchandise unless otherwise indicated may be returned within 30 days from the shipment arrival date for a refund. A Returned Merchandise Authorization (RMA) number is required for all returns. A 15% restocking fee may apply. Additional deductions may be made to reflect the products current market value. These terms apply to all refunds. Most products are shipped with a refund/replacement guarantee period unless otherwise noted in the product listing. Customers must inform of any order discrepancy within 7 days from the invoice date so that we may investigate and resolve the situation accordingly.
  • Warranty
    This product is backed with a 2-year Manufactures defect warranty!
  • satisfaction guarantee offers our customers a 30-day satisfaction replacement or refund guarantee on all purchases, except when otherwise noted in the product listing.
  • Cross-Shipments will not cross-ship returned merchandise.
  • Physical Damage Policy
    Physical damage to any product purchased at will effectively void warranty coverage. Physical damage includes but is not limited to improper handling and/or any other type of damage sustained by irregular usage.

Warnings & Notices

Safety warning icon

This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to

Customer Reviews

4.7 Based on 3 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:

Nathan k3 parts

Shipping was a little slow but I’m satisfied with the overall experience



Really good and my horns are 10 times louder than before


Huge improvement

I ordered this kit to upgrade to 1/2 inch from 1/4 inch air line as well as a 1/2 inch solenoid. Let me tell you, my horns don't even sound like the same horns. Slightly deeper and a LOT louder. Definitely woke them up.