AN-4 Vacuum Adaptor for GFB Blow-Off Valves

This adaptor replaces the factory brass hose barb fitted to selected GFB blow-off valves, converting the connection to an AN-4 male flare. It is ideal for high-boost setups where a braided vacuum hose is preferred for strength and reliability.

Designed for High-Boost Applications

When running increased boost pressure, standard rubber vacuum hose connections can become a weak point. This adaptor allows a secure AN-4 braided hose connection directly to the blow-off valve.

Quality Construction

Manufactured from stainless steel, the adaptor is supplied with a Viton O-ring to ensure a reliable, leak-free seal against the blow-off valve body.

Compatibility Notes

This adaptor suits all GFB Mach 2, Hybrid, Respons, and Deceptor Pro II blow-off valves where the existing brass hose barb features a female hex in the port.

Early versions of these blow-off valves used a round port with a different thread and are not compatible with this adaptor.