to swap factory 18" wheels for fitted 17" wheels
Sorry for the confusion. I should have been clearer. I meant putting VW 18" wheels on a car equipped with 17" wheels.

The estimate of $800 a corner is to go from 17" wheels to 18" wheels if the car does not come with the 18" wheels factory fitted. Assumes you trade in tyres on 17" wheels and keep the rims.

I got this estimate before the car I wanted became available (no other cars with 18" wheels) and it would have been the final factor in swinging my decision away from a Mk6 GTI and to an R32.