I didn't know Peak Performance were chinese food enthusiasts, haha.
Check the box my polyrurethane subframe collars came in:
Install went pretty smooth, a little over an hour while taking my time.
I'll edit this post once I'm back from my test drive.
Edit:
Well I got back from my test drive and my idea of the collars letting the subframe act like a large brace didn't exactly work as I hoped.
The trunk/backseat area doesn't make any noises when going up driveways anymore, by now I have just a little bit now coming from my B pillar.
Better than nothing!
My rear end is noticeably more stiffer now, it doesn't feel as loose as it did when I'm making hard turns.
Also, the car stopped jerking back and forth in 1st or 2nd when I went from accelerating to engine braking, or engine braking to accelerating. (Which was annnoooying! And sort of uncomfortable.)
I also had wheelspin while going up my driveway today, which never happened unless I went up it at an extreme angle.
So it did add a good amount of stiffness to the rear, which I'm happy with.
So there is a good benefit to these, I'd recommend them.
Many people say the aluminum collars added more noise to the cabin, but I didn't notice any extra noise with these polyurethane ones, so I'd say it was worth the extra cost since this is my daily driver.
And just because these are polyurethane, don't think they are soft!
They are quite hard!
Here's some camera phone pictures to make you happy.
Diff is getting sort of dirty...
Btw, does anyone want to trade their aftermarket front swaybar for my Tanabe rear swaybars?