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Softer spring to fit all Mach 2, Respons TMS, and Deceptor Pro II dump valves.
This softer spring is supplied as standard with all Mach 2 dump valves operating in full recirculation.
It can also be fitted to Respons TMS and Deceptor Pro, but should only be used when the dump valve is in full recirculation or the engine idle vacuum is less than 0.64 bar.
In atmospheric dump mode and if the engine idle vacuum is greater than 0.64 bar, the standard GFB6115 spring should be used.