Is that some sort a trunk lid overlay?

 

That's the Tommy Kiara spoiler, I believe they're a direct Japan import and cost about $600.
The look clean, I've heard some have had fitment problems but do look nice back there.

 

The tommy kaira spoiler is not bad at all.

If given a choice I would order them

Tommy Kaira
Stillen spoiler
OEM

 

IMO the stillen one looks weird how it has part of the chrome thing sticking out, like maybe it would work with a color matched chrome piece but i just dont like that look... the 2009 OEM spoiler on the other hand...
it just flows with the curves all over the car...



^^my G ^^

and then an even more beautiful G with spoiler

 

Agree 100%, looks like it truly belongs on the car & not an add on

 

The OEM spoiler doesn't look bad, I just think the stillen looks more "organic" but only if you paint the chrome finisher to match. If you don't paint the chrome piece then it just looks out of place by comparison

 

g37 decklid!

 

No spoiler. Unless you're running a theme on the car. I love the black on black. But spoiler on silver looks out of place and unusual.

But I would stay away from aftermarket spoilers or even oem spoiler. Looks too ricey! just my opinion.