Kristin Justus brought her 2016 Subaru WRX to the 2017 SEMA Show and made sure it would be heard as well as seen. Space was tight in this compact vehicle, but that didn't stop her from installing a serious horn setup. She customized a Shocker XL Train Horn, mounted on a bracket cleverly hidden behind the front grille.
The Shocker XL Train Horn (part number AH-S4) is a four-bell horn with bells measuring 19.50 inches, 16.25 inches, 14.75 inches, and 12.75 inches respectively, each with 5-inch flares. The horn is constructed from fiberglass-reinforced ABS material, weighs 4.5 pounds total, and operates at a maximum pressure of 150 PSI. The Shocker XL includes the four-bell horn, air line, 1/2 inch stainless steel electric air valve, and fittings, but does not include an air tank or compressor, which must be purchased separately.
This strategic placement not only conceals the horns but also allows maximum forward sound projection. By tapping into her WRX's existing onboard air suspension system, Kristin integrated the train horns seamlessly, creating a stealthy but powerful upgrade. Now equipped with the unmistakable tone of a locomotive, Kristin's WRX can easily cut through traffic noise, alerting distracted drivers and commanding attention on the road. What started as a compact show car now delivers an unmistakable message, this WRX may be small, but it's not to be overlooked.
Feature Highlights
- Shocker XL Train Horn with four-bell design for authentic train horn chord
- Flexible mounting allows each bell to be mounted individually
- Fiberglass-reinforced ABS construction for durability
- Stealthy installation behind front grille for maximum forward projection
- Compatible with existing onboard air suspension systems
TRANSFORM YOUR COMPACT CAR
Transform your compact car or show vehicle with the Shocker XL Train Horn, just like Kristin's installation. Experience the same stealthy but powerful upgrade that proves even tight spaces can accommodate serious sound, ensuring your vehicle can be heard as well as seen and delivers an unmistakable message that commands attention on the road.

