These are an upgrade caliper for Sram brakes, the will instantly provide 20% more power over the stock 4 piston calipers. Save $200 per pair. Normally $300 ea.
Using these 4-piston calipers in place of the existing Code calipers (R, RS, or RSC), increases braking power by 20%, making these the strongest brakes in the marketplace. They retail for $300 ea with tax, and are not cheap, but they will reshape the way you think about brakes. They use larger pistons than original codes, the small piston is the same size as the larger code piston, etc. The piston surface area and the hydraulic leverage of the system increase by 20%, which directly translates to 20% more clamping power for the same finger force.
Can be be used in any DOT fluid system, not compatible with mineral oil.
Also have Code levers (not shown) with the redesigned Cascade swing link cam installed for shorter throw to brake bite. $49ea. It makes them perform more like the shimano feel.