1) It really stiffens the rear end, but would not know does the alloy sub frame brake. Someone wants to test it?
2) The weight difference is approximately 15 percent lighter than the original.
I'll check the exact difference in weights.
3) Yes the rubber is bonded, a pair has a stainless steel cylinder in the middle of the rubber. It is made of high quality Dunlop rubber and vulcanizing a special technique to adhere to stainless steel
4) Yes, it will outlive the car itself
5) They are machine made specifically for this use.
6) This is for the original arms. Doesn't apply for my suspension arms
7) The rear end is more stiffer(doesn't knock), the car handles better, life span is 3x longer than the original(bushes), it will never rust(stainless steel). The originals are not made from steel, but from vulgaris Iron. That's the whole point, if you get a chance try to bend the old Iron suspension arm, you will probably succeed. You absolutely can't bend my suspension arm with your legs and arms (if you bench press 300 pounds, then maybe