These are for cars that go on the track, not street cars. Thats why they are removable.
New FFR $24K-???
Sticky tires $1200
SA2010 helmet $400
Weekend at Laguna Seca $499
Hotel and Travel $500
Black flagged after first lap and sent home due to sound... Priceless!
... and I have seen it happen at several tracks both racing and just for fun track days.