@ArildStavrum They say the rev g is better but I've read on the forum that some are tearing so the best solution is the gfb dv+ that doesn't have this diaphragm and has a piston alternative which has been recommended by many and why I've replaced my diaphragm.
The dv is the actuator or controller that controls boost and when the diaphragm tears the car loses boost so in turn that needs replacing with a rev g that's meant to be better but alas a load of cack as that one also tears open so comes the GFB dv+ to take the strain off the diaphragm and use its own pre loaded piston spring loaded for I think better pressure hold and no chance of boost leaking from it if you take the GFB and associated bits out and have a close look you'll understand what I mean. I think
The gfb replaces the diaphragm itself and not the rev d g c b a or which ever it is so I don't need the diaphragm that's torn as that's a bin job and no need for a new one of those as the gfb does the diaphragms job and much better so everyone using them say including
@Shoduchi @Tfsi_Mike who did a review on the gfb.
Hope that's a little more understandable.
I've not tried and tested it to the full as I'm waiting for tomorrow evening when I take take a good spirited drive and be the judge for myself