GFB has the largest range of blow-off valves on the market, from the silent Plumb Back type to ear shattering dump valves, we have a product to suit your needs.

Mach 1 One of the loudest valves in our range, the Mach 1 will really let people know you're coming!

Basic Large flow capacity, suitable for BIG horsepower.

Deceptor Pro GFB's Deceptor Pro - The world's first in-car electronically adjustable blow-off valve. Proportional volume control from the driver's seat!

Respons Respons TMS is the best BOV on the market.  With quick and easy venting bias adjustment and the valve to use when wanting to achieve noise on a car that is sensitive to atmosphere venting e.g. VAG applications