If your blow-off valve vents to atmosphere for sound and the vehicle is used in dusty or dirty conditions, the GFB 5703 trumpet is designed for that purpose. It delivers the enhanced blow-off sound of a traditional trumpet while incorporating a 38mm (1.5") outlet that allows a suitable filter to be fitted.

The 38mm outlet is sized to accept a compatible foam filter such as the GFB 5711 (sold separately), helping protect the blow-off valve from dust, sand, mud, and other debris without compromising airflow.

By combining filtration with a trumpet-style outlet, the 5703 provides a louder and more distinctive blow-off sound compared to a standard hose barb outlet, while still offering practical protection for real-world driving conditions.

Compatibility:
Suitable for use with GFB SXV, Mach 2, Hybrid, Respons, and Deceptor Pro II blow-off valves.