The GFB Whistling Trumpet is an atmospheric whistle adapter that adds an audible venting whistle to your turbo Ford EcoBoost. It fits the 2015-2026 Ford Mustang 2.3L and the 2020+ Ford Bronco 2.0L, 2.3L, 2.7L and 3.0L EcoBoost engines.
Specifications
| Type | Whistling Trumpet atmospheric whistle adapter |
| Operation | Vent-to-atmosphere |
| Fitment | 2015-2026 Ford Mustang 2.3L / 2020+ Ford Bronco 2.0L-3.0L EcoBoost |
| Part Number | T9404 |
Shipping: In-stock orders placed before 4 PM EST ship the same day, with standard, expedited, and overnight options available at checkout. Backordered items ship as soon as our distributor restocks — contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
