Dennis, The lowering spindles are great if you are on a tight budget and want more drop than just springs and I am going to use them on my next project becuase it is going to be a very very low budget cruiser NA V8 car. BUT, they are horrible for ride quality and will most of the time rub pretty badly. The difference is that they are a mimic of the stock spinlde but with the hub moved straight up. Our cars have horrible bump steer issues that to the average Joe arent noticeable until they start to lower the car. The problem is the wheel pretty much moves straight up when nder load and hit the outer edge of the wheel well. With the taller ball joint and spring combo, the wheel moves up and the top of it moves inward at the same time. This basically does two things: 1. Keeps the wheel flat on the ground under cornering instead of riding on the outer edge. 2. Allows the wheel to follow the contour of the wheel well, hopefully taking away the rubbing issues. Do a search on Google for BUMP STEER. Marcus Savitski @ SCANDC.com is excellent with our suspension geometery, check out some of his products. He has excellent costumer service and top of the line parts.