I did rear polys ab 2 years ago. I forget the brand, so I will comment only on the experience. If you ever wanted your 'big ass' SAV to betray its size in the twisties, poly made the difference for me. It is night and day. No 'squat' on accel- just go. Watch that a$$ on the Tail of the Dragon- use those 315's out back. It's tight. But man, it really holds and you can feel everything.

So- yeah. Feel everything. My wife's 4.4 E53 is a completely different thing. It is so different that she really thought something was wrong with her OE setup after driving mine for a week. Of course, my 4.8is has Eibach sways, urethane rear and solid core front bits. It's a very different ride. (also, if I do say, the stereo kicks @$$). Those poly bits in the rear completely change the wandering ass you get at 7/10. You're planted in the curves. But the real difference for me was straight line. No squat. Just 'Go'. The transfer of all that weight to the rear power delivery just happens right now- and especially when both 315's are planted.

The old people (my dad and my mother in law) LOVE the E38 compared to the harsh ride of my 4.8is. Welp. I suppose that's why I have 'em both.

As an aside, I did the same poly subframe to my 2020 M2C. It's part of why the idiots that stole it wrecked it a half mile in. You gotta know what you're doing on a little thing like that. It snapped back and they wrapped it around a pole. My passion project was dead.

I love it on the E53. If we weren't gonna sell the '04 4.4 after we do the seals, I would dress it the same.

I just realized that my avatar is with the polys on the Tail of the Dragon. I am at 8/10 there and look at that squat. A lot of that is Eibach, but I have (somewhere) pics of the same curves. The polys make WAY less lean.

__________________