Just put them on an '11 Ram 1500. I pull an atv/landscape type trailer and factory setup sagged stupid at the hitch/ball. With the minimum recommended air, the trailer/truck stay level. Felt all the difference while driving (headlights proper, steering truer, and no more close calls with dragging tongue jack). Hauled a skid steer bucket load of gravel for neighbor, saw the squat as it fell in, but truck drove great (would've sagged to heck without the Timber Groves). Also, great guy to work with ordering, questions, any issues/concerns-and prompt! Overall 10 outta 10 product-