Torque Boxes and Subframe Connectors

Same guy selling the torque boxes makes the subframe connectors, US Cartool. Has his own website at uscartool.com. I'd use the subframe connectors if I had to pick just one. Seems like it sould tie the front and back of the car together better to reduce flex and sag. Could be dead wrong, but you can now literally jack up ther entire side of the car from just the front or the back. My 2 cents, overpriced as it may be.