I took my 'non kit GTi' black splitter off because it tends to scrape on everything even when the car isnt that low, mainly getting on and off my nans driveway and access to work.
So Ive fitted 195/55/15 Toyo's (had 195/50/15 before) and lowered it an extra 30-40mm. Arch fill and stance is much better now, and it doesnt scrape. Will probably lower the front end a touch more tommorrow.
One thing it does need for sure is 20mm hubcentric spacers and extended wheel studs. These wheels are tucked big time.