The Kiske spoiler, Skyline GT-R R35 Spoiler vs. ebay replica
 

back in 2012, there was this thread. kiske's preview pics start at post #47
http://www.ft86club.com/forums/showthread.php?t=7835

there were 2 known installs before kiske, but he's the only one that documented doing it, so that's why i'm calling the kiske spoiler.

anyways, ebay has some replica gt-r spoilers for cheap, i ordered one, hoping i could use some of the parts in my own install. turns out i won't be able to, but figured i'd post what i learned.

here's the ebay link and picture:
https://www.ebay.com/itm/Fits-13-20-...72.m2749.l2649

https://i.ebayimg.com/images/g/vhkAA...09/s-l1600.jpg

the positive of the ebay spoiler is that it mounts directly to the oem spoiler holes with no modifications. the negative is that the holes across the rear are still an issue.

i have an oem gt-r trunk lid/spoiler for this, here's the comparison of the 2 next to each other.

https://i.imgur.com/Kw8Lndo.jpg
https://i.imgur.com/hWPXVJL.jpg
https://i.imgur.com/T3W8t4Z.jpg
https://i.imgur.com/AENb96Q.jpg

overall, the ebay spoiler is taller everywhere.
https://i.imgur.com/OvmUwIG.jpg
https://i.imgur.com/vf0uPbc.jpg


the center support is also 'chunkier'
https://i.imgur.com/DeVkDt2.jpg
https://i.imgur.com/7nOHh6z.jpg


but the gt-r wing is wider.
https://i.imgur.com/VonEFLG.jpg
https://i.imgur.com/LcH7pBo.jpg


overall, it's a "10' spoiler" meaning it looks good from 10' away, but the significant flaws show any closer than that. the line sculpting is with a heavier hand. just overall chunkier and less flowy than the oem part.

https://i.imgur.com/iwncfW9.jpg
https://i.imgur.com/BuQOZ3T.jpg
https://i.imgur.com/dduR3jD.jpg
https://i.imgur.com/Okonuot.jpg

there's also the ton of mold flashing that would require a lot of sanding to get to an acceptable final product
https://i.imgur.com/KyRxR7E.jpg


here it is using the oem bolt holes. note that upon removal, i noticed that it pulled the surrounding metal up into the spoiler, due an uneven fit between the parts-- not a problem when i'm going to be fabbing and installing something else, but a serious problem if i was going to attempt to re-install the oem spoiler later on.
https://i.imgur.com/JBPbb1R.jpg


and here's the oem gt-r holes. there's 3 of them, with the 3rd in the hole of the trunk rib.
https://i.imgur.com/YNNN20L.jpg


kiske mentions in one of the posts that additional metal is required in the center, as the trunk lid puts quite a lot of force into that center support. it was very apparent with this ebay spoiler as well.

here's a shot of the underside of the trunk lid-- the holes in the bottom are the oem spoiler holes that are on the angled portion. note that there's no support, but it is relatively easy to access the area.
https://i.imgur.com/aWW0TGl.jpg


and on the gt-r oem spoiler, i noted that the area was reinforced, with a separate piece of metal between the structure and the outer skin. it's just barely evident through the bolt holes in this shot.
https://i.imgur.com/zVuvhtc.jpg

overall, the gt-r lid is build up much more extensively than the brz lid is, by looking at all the solid surfaces in any of the near-vertical areas on the back portion of the lid.
https://i.imgur.com/Pn1jjol.jpg

the brz lid is a lot lighter for obvious reasons
https://i.imgur.com/58MX29j.jpg


moving forward, i'm going to be folliwng kiske's build a little more than what i learned from the ebay spoiler, but nonetheless, the overall placement and bracket fabrication of the ebay spoiler has helped show where the oem gt-r spoiler needs to go, and some of what is required to make it work.