I did the pre-cat delete yesterday, great mod... the VCDS dyno is showing around 6bhp and 11 lb/ft increase; but the main reason I did this was to bring my EGT's down, now down by 60*C off peak numbers over 3 runs.
Surely that's got to add some longevity to the turbine.; that pre-cat brickwall can't be healthy when your running updated software, even if it's just stage 1.
I've noticed a slight decrease in spoolup time, and slightly more turbo noise.
Induction kit now :)