I did this, drilling out the restrictor on the fuel line and since I have the banjo bolt I just had to remove the rubber hose to access it.
Why? Because when I used to accelerate hard it would keep cutting out like fuel cuts were happening. Over the last 9 months I had changed the in-tank fuel pump, the fuel pump, three oil changes, spark plugs, checked the coils, the cam follower and hpfp and I was still getting cut outs which felt like misfires.
But this little mod worked, thanks
@ROH ECHT as I found on an american Golf forum. I drilled it out to 4mm but now it pulls without any hesitation, spluttering, cut outs or misfiring, no matter which gear in. Unsure if any gain to be had by going 5mm, so I think I'll leave it as it is. Thanks again.