Likely cost. The 9 wing didn't have carbon panels on the inside of the end plates either.

 

^ yea true i guess it adds up when you make 8000 cars, its just too bad it cost the wing its structural integrity, however i run the gurney flap on my ix wing and it hasn't given in on me yet..

 

https://www.facebook.com/ralliartchinaltd/photos/a.381968525152960/2951350334881420/?type=3&theater
Ralliart china does them.

I have one on my car from Rexpeed, they had to send a second as the first one was snapped. OEM they were gray not black.

 

...as simple as weight saving. You can actually disassemble the Evo IX wing (the inside covers are velcro'd on which allows you to get to the screws holding the wing together) and you could fill the wing with an expanding builders foam if its a concern.I have a Gurney flap on mine and I've had it up to 210kph on trackdays with no issues. I wouldn't be trying a max speed run with it on though! There is enough evidence to suggest the wing can't take the extra load at high speed.

 

^ This is good to know, I had no idea those end plates were velcro.

 

Heres a pic of my 9 wing at the track. Dented my trunk as well when it failed (double whammy=)

 

yea prety much why i got the 8 wing. hopefully it can withstand the gurney flap

 

One of the uprights on my 9 wing with a gurney flap stress cracked after getting up to around 140mph

 

interesting - pic?

 

I don't think I ever took any pics, and it's fixed now, but here's where the crack was. I was baffled as to how it happened for a while until I started reading about the issues with 9 wings.

 

I have hit 160mph+ with the gurney flap on my 9 wing and it did not snap on me. Apparently, I was lucky. My car came with an evo 8 wing somehow, but it was yellowing so badly that the dealership gave me a new IX wing under warranty 10 years ago. Now i'll need to look around for another.

 

Now there's a gem...

https://www.ebay.com/itm/NEW-OEM-SPO...YAAOSwFGNcD0Sm

 

i'd say so. also, wind can make a huge difference in how much force the wing is seeing. my old one (TB evo 9) bent on an extremely windy day on the highway. i think my case was unusual but it'll obviously be exacerbated in track day situations

the nice thing about pretty much all the other colors on the 9 is they were made in the 8 every year. i guess electric blue is the only other car that has this problem.

 

I agree as well. My wing failure had a lot to do w/the high winds at the track, that day, coupled with Fontana speeds

 

fortunately though, never heard of an 8 wing failing.