the rears are more expensive, they need everything the front needs, plus they also need to include the 2 rear knuckles which are around $400+, then theres 2 backing plates too. then you still need my balljoint adapters that might be ~$50 or so, then, another thing to keep in mind is, the rears are more expensive to install because of the knuckle swapping necessary, not just a caliper & rotor swap... def still worth it, but not as huge of a value as the front, & not as much actual functional value either, rears are more for aesthetics & look to match the front... for strictly performance just the fronts are the best bang for the buck, but the rears are def sweet too...