Originally Posted by
Oranoco
I went through loads of different ones before realising they don't have any benefit at all and getting rid of it completely. Even if you find one that works the car will still drive nicer without it in place.
Agree there m8 the first couple of rst's i had i always had a dump valve on but then took it off one day and realised how much better they are to drive am now on my 17th rst without a dump valve lol