The 4000 Series XS Gold brake rotors provide all the benefits of 4000 Series, with a premium non directional cross drilled and slotted design, including an appealing gold coated finish on the rotor hub. The implementation of the distinctive cross-drilled and slotted design enhances the number of exit points, facilitating the efficient release of brake pad friction dust and gases through both the cross-drilled holes and slots, thereby improving braking performance. Most of DBA's 4000 Series Brake Rotors feature the revolutionary Kangaroo Paw ventilation system. This system incorporates a pattern of 144 diamond and teardrop-shaped pillars, resulting in an impressive 30% increase in surface area and a notable 20% improvement in cooling efficiency compared to traditional straight vane designs. Moreover, all 4000 Series Brake Rotors come equipped with Thermographic heat paint markings. These markings change color at specific temperature thresholds, offering a useful visual indicator for monitoring braking temperatures and assessing rotor fatigue. Offering comparable performance advantages to the T3 slot, the XS Gold presents a favored alternative, particularly well-received in show car applications. However, it's important to note that drilled rotor configurations are not advisable for rigorous off-road or track day usage.