Toyota's Nur Spec kit doesn't come with any instructions, presumably because it is supposed to be installed at the factory... and in another country. So, I took it upon myself to find my own information along with some comments from my body shop...
The closest I could find was exploded diagrams of each part, inserted below:
Front Under Spoiler
Rear Under Spoiler
Side Skirts
Rear Deck Wing/Spoiler
The kit comes with the 2 side skirts, a 3-piece front lip, 3-piece rear lip, and 11 piece or so rear spoiler... and a bag of about 10,000 pieces of hardware. All the hardware bits are individually wrapped and have part numbers on them. The diagrams I found had different part numbers tied to them, but the bag's part numbers listed out to the side. I made a table that compares the two different part numbers which will allow you to match them easily. Below:
Rear Under Spoiler
SU003-03949 --- 76793C --- Bracket, Rear Spoiler No.2 RH
SU003-03950 --- 76794C --- Bracket, Rear Spoiler No.2 LH
SU003-03971 --- 76867 --- Retainer, Rear Spoiler Side RH
SU003-03972 --- 76868 --- Retainer, Rear Spoiler Side LH
SU003-03954 --- 76871B --- Cover, Rear Spoiler
SU003-04055 --- 76879B --- Clip, Rear Spoiler No.2
SU003-02963 --- 76889 --- Clip, Rear Spoiler No.2
SU003-02988 --- 76889D --- Clip, Rear Spoiler No.2
SU003-03955 --- 76897A --- Spoiler, Rear Side RH E8H Galaxy Blue Silica
SU003-03956 --- 76897A --- Spoiler, Rear Side RH 61K Dark Gray Metallic
SU003-03957 --- 76897A --- Spoiler, Rear Side RH H8R Metallic Orange
SU003-03959 --- 76897A --- Spoiler, Rear Side RH C7P Red Lightning
SU003-03960 --- 76897A --- Spoiler, Rear Side RH D6S Sterling Silver
SU003-03961 --- 76897A --- Spoiler, Rear Side RH D4S Crystal Black Silica
SU003-03962 --- 76897A --- Spoiler, Rear Side RH 37J Satin White Pearl
SU003-03963 --- 76898A --- Spoiler, Rear Side LH E8H Galaxy Blue Silica
SU003-03964 --- 76898A --- Spoiler, Rear Side LH 61K Dark Gray Metallic
SU003-03965 --- 76898A --- Spoiler, Rear Side LH H8R Metallic Orange
SU003-03967 --- 76898A --- Spoiler, Rear Side LH C7P Red Lightning
SU003-03968 --- 76898A --- Spoiler, Rear Side LH D6S Sterling Silver
SU003-03969 --- 76898A --- Spoiler, Rear Side LH D4S Crystal Black Silica
SU003-03970 --- 76898A --- Spoiler, Rear Side LH 37J Satin White Pearl
SU003-03952 --- 76973D --- Cover, Rear Under Side RH
SU003-03953 --- 76974D --- Cover, Rear Under Side LH
Rear Deck Spoiler
SU003-01986 --- 76085A --- Cap (For Rear Spoiler)
SU003-03382 --- 76791 --- Bracket, Rear Spoiler No.1 RH
SU003-03383 --- 76792B --- Bracket, Rear Spoiler No.1 LH
SU003-03368 --- 76871 --- Spoiler, Rear
SU003-03384 --- 76893A --- Cover, Rear Spoiler RH E8H Galaxy Blue Silica
SU003-03385 --- 76893A --- Cover, Rear Spoiler RH 61K Dark Gray Metallic
SU003-03386 --- 76893A --- Cover, Rear Spoiler RH H8R Metallic Orange
SU003-03387 --- 76893A --- Cover, Rear Spoiler RH C7P Red Lightning
SU003-03388 --- 76893A --- Cover, Rear Spoiler RH D6S Sterling Silver
SU003-03389 --- 76893A --- Cover, Rear Spoiler RH D4S Crystal Black Silica
SU003-03390 --- 76893A --- Cover, Rear Spoiler RH 37J Satin White Pearl
SU003-03391 --- 76894 --- Cover, Rear Spoiler LH E8H Galaxy Blue Silica
SU003-03392 --- 76895 --- Cover, Rear Spoiler LH 61K Dark Gray Metallic
SU003-03393 --- 76896 --- Cover, Rear Spoiler LH H8R Metallic Orange
SU003-03394 --- 76897 --- Cover, Rear Spoiler LH C7P Red Lightning
SU003-03395 --- 76898 --- Cover, Rear Spoiler LH D6S Sterling Silver
SU003-03396 --- 76899 --- Cover, Rear Spoiler LH D4S Crystal Black Silica
SU003-03397 --- 76900 --- Cover, Rear Spoiler LH 37J Satin White Pearl
Front Under Spoiler
SU003-02984 --- 71196A --- Clip
SU003-04184 --- 76841A --- Cover, Front Spoiler RH E8H Galaxy Blue Silica
SU003-04185 --- 76841A --- Cover, Front Spoiler RH 61K Dark Gray Metallic
SU003-04186 --- 76841A --- Cover, Front Spoiler RH H8R Metallic Orange
SU003-04188 --- 76841A --- Cover, Front Spoiler RH C7P Red Lightning
SU003-04189 --- 76841A --- Cover, Front Spoiler RH D6S Sterling Silver
SU003-04190 --- 76841A --- Cover, Front Spoiler RH D4S Crystal Black Silica
SU003-04191 --- 76841A --- Cover, Front Spoiler RH 37J Satin White Pearl
SU003-04192 --- 76852A --- Cover, Front Spoiler LH E8H Galaxy Blue Silica
SU003-04193 --- 76852A --- Cover, Front Spoiler LH 61K Dark Gray Metallic
SU003-04194 --- 76852A --- Cover, Front Spoiler LH H8R Metallic Orange
SU003-04196 --- 76852A --- Cover, Front Spoiler LH C7P Red Lightning
SU003-04197 --- 76852A --- Cover, Front Spoiler LH D6S Sterling Silver
SU003-04198 --- 76852A --- Cover, Front Spoiler LH D4S Crystal Black Silica
SU003-04199 --- 76852A --- Cover, Front Spoiler LH 37J Satin White Pearl
SU003-04176 --- 76853B --- Cover, Front Spoiler Center E8H Galaxy Blue Silica
SU003-04177 --- 76853B --- Cover, Front Spoiler Center 61K Dark Gray Metallic
SU003-04178 --- 76853B --- Cover, Front Spoiler Center H8R Metallic Orange
SU003-04180 --- 76853B --- Cover, Front Spoiler Center C7P Red Lightning
SU003-04181 --- 76853B --- Cover, Front Spoiler Center D6S Sterling Silver
SU003-04182 --- 76853B --- Cover, Front Spoiler Center D4S Crystal Black Silica
SU003-04183 --- 76853B --- Cover, Front Spoiler Center 37J Satin White Pearl
SU003-04200 --- 76857 --- Retainer, Front Spoiler Side RH
SU003-04201 --- 76858 --- Retainer, Front Spoiler Side LH
SU003-02964 --- 76917D --- Clip
SU003-02989 --- 76917E --- Clip
Side Rocker
SU003-04231 --- 75850A --- Moulding Assy, Body Rocker Panel RH
SU003-04232 --- 75860A --- Moulding Assy, Body Rocker Panel LH
SU003-02964 --- 75867A --- Clip, Rocker Panel Moulding
SU003-02978 --- 75867C --- Clip, Rocker Panel Moulding
SU003-02989 --- 75868B --- Clip, Rocker Panel Moulding No.2
SU003-02990 --- 76923B --- Retainer, Side Mudguard
There is also the part numbers for the larger pieces should anyone need them for anything...
The guy at my body shop (miracle worker) is pretty cynical and says every other body shop sucks ass, lol. So, he thinks other shops will cut corners with certain things like mounting the spoiler properly/straight, drilling the sideskirt holes (he thinks most won't and will just double-sided tape them), and drilling the front/rear bumper holes which are required if you use the supplied brackets. THIS IS ALL POSSIBLE. He did it, I've seen it, it can be done. Just FYI too, every rear bumper (FR-S and BRZ) and FR-S like front bumper comes with circles imprinted on the inside of the bumper which is exactly where the drilling is required to mount the brackets for this kit.
Hope this helps for anyone who is considering this kit, has this kit, or is trying desperately to mount this kit. I'll gladly answer any questions anyone has and can ask my mechanic anything I'm not sure of. Enjoy!
P.S. Pics coming soon I hope...