Incorrect.
I like your way of thinking!
Correct.
Autech is kinda like Nismo - they're a factory-certified tuner (just like AMG, HSV, FPV/Tickford, etc.) who do special work for the Nissan factory, anything from the (very rare, but very real) 4-door R33 GT-Rs, to the 260RS Stagea (basically a series 1 RS-Four or series 2 RS-Four S Stagea with extra body strengthening and R33 GT-R running gear), through to modifications for people with disabilities who need wheelchair access to their cars, etc.
http://www.autech.co.jp/EN/index.html