larger than stock by about an 1/8". i have some 9819 for the front of my car, and i tried to see if they would fit the rear. i just bought new arms for my car because i did not want to buy two more ball joints and find out they wouldn't fit. i do not know if TT LCAs are different than NA arms. but they do have different part numbers and the turbo arms cost more. keep us updated when you find out if the 9633 fits.