If you're stage 4 then you'll be running around 620-630.mines a stage 4 with downpipes and when i raced my bro he seem to be moving away a little faster from me at just over 100mph they where approaching 200mph and he took a bit more time to over take him.
Quite a bit done thenJust checked he has a y pipe gt2 rs turbos and intercooler full exhuast well not much as its short as hell with the engine being in back and remap. Im the same when i launch he can't catch me over 100mph he starts reeling me in but remember his car is almost 300kg lighter than ours so that certainly makes at difference once it gets going and it pulls hard he was hitting speeds of 205mph.
Search for the video of the 991 Turbo S vs the LaF as the Pork out dragged it.well funny you say that here is a videos for you VMAX200 EvoMax: Porsche 991 Turbo S vs Porsche 997 Turbo - YouTube i was expecting better.
But this on the other hand made it look like he was driving a fiesta VMAX200 EvoMax: Ferrari La Ferrari vs Porsche 997 Turbo - YouTube