Morning all. My car seems to be making a fluttering sound on boost. It's really noticeable when accelerating in 6th gear at around 3500rpm, sometimes in 5th gear too. I've just fitted a revision G diverter valve as the old one had a split diaphragm. It transformed the performance of the car but now notice the fluttering noise. Has anyone got any ideas? My mods are in my sig below.
Thanks in advance, Ash
