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The GFB standard spring is a direct replacement used in atmosphere‑venting blow‑off valves, compatible with most GFB valves except 1002. It’s the factory-style spring fitted in Respons, Deceptor Pro and Atmosphere Mach 2 valves to set the valve’s venting response. Use this spring when restoring original valve behavior or when replacing worn internal components on compatible GFB atmosphere‑venting valves.
GFB Standard Spring (used in all valves except 1002)
