Hear for yourself how GFB blow off valves sound!

Fully Recirculated, In Car Sound

100% Atmosphere Venting, Drive By Sound

100% Atmosphere Venting, In Car Sound

100% Atmosphere Venting, Revving Sound

100% Atmosphere Venting, In Car Sound
– Fitted with 5702 Whistling Trumpet

100% Atmosphere Venting, Drive By Sound
– Fitted with 5702 Whistling Trumpet

Fully Recirculated, In Car Sound

100% Atmosphere Venting, Drive By Sound

100% Atmosphere Venting, In Car Sound

100% Atmosphere Venting, Revving Sound

100% Atmosphere Venting, In Car Sound
– Fitted with 5702 Whistling Trumpet

100% Atmosphere Venting, Drive By Sound
– Fitted with 5702 Whistling Trumpet

Fully Recirculated, In Car Sound

100% Atmosphere Venting, Drive By Sound

100% Atmosphere Venting, In Car Sound

100% Atmosphere Venting, Revving Sound

100% Atmosphere Venting, In Car Sound
– Fitted with 5702 Whistling Trumpet

100% Atmosphere Venting, Drive By Sound
– Fitted with 5702 Whistling Trumpet