This is for those that ended up buying trunk lift supports shocks from eBay or Amazon and ended up having trunk slamming issue or trunk wobble when fully opened due to the support shocks heads being oversized and hard fitment because of the support heads are too large.

I bought these last week and they finally arrived today: Amazon Item# B00KJLMLSE (Tuff Support #614167)
At first glance, they looked slimmer than the Amazon crap i bought but after braking off the oversized head from the Amazon junk to remove them, i snapped these onto the ***** and SHAM w0w moment came!
No more issues with a wobbling trunk when fully opened, no more slamming either, these are a lot harder to close and actually lift my trunk with a ducktail spoiler fully open after i lift it about 5".
I'm not sure if G35s with spoiler or without have the same mounting *****, but if they do, then these lift support shocks fit like OEM for only $20!

G35 V36 Sedan trunk support (Tuff Support 614167)