As someone who happens to be lucky enough to drive a '1998 Triton Utility' you will appreciate I am in a position to know a thing or two about luxury cars.
The modifications I speak of get installed pre-importation so the vehicle gets reclassified before it is shipped and therefore bypasses the luxury car sales tax, no matter it's value. In fact according to the department of 'Car Registration & Automobile Procurement' for every one 'luxury car' imported in 2014 there were over 70 thousand 'pimpmobiles' imported that bypassed the tax of which you speak.
The facts speak for themselves. And if you can't trust the department of C.R.A.P then you can't trust anyone in my humble opinion.