i dont know a huge deal about these or how they work but my S2 is missing its amal valve, the wiring is there for it though. My mate pointed it out the other night. i've got a spare one from an S2 i broke, question is, what does it do and do i need it?

At the moment, my car has a fulll stainless, cone filter, dump valve and radtec front mount cooler - my next step was a -31 actuator and a chip. just wondered where the amal valve comes into all this?

CheeRS