This brake kit will save you about 1-1/4 lbs. rotating and unsprung weight over the SA stainless inboard kit. We recently put one on the 69k because I wanted to save the weight. What I didn't realize or expect, is how much better it stops. If you currently have a stainless kit and would like more brake, you can just buy the rotor, caliper, and pads. The rotor is thinner so you need a thinner caliper.