• Cast from XG-150 high carbon alloyed iron
• Thermal Stability Profiling process
• Patented Kangaroo Paw ventilation, 144 diamond/teardrop pillars
• Up to 30% more surface area, 20% better cooling than straight-vane design

Metallurgy Built to Take Repeated Abuse

DBA casts the 4000 Series from XG-150 high carbon alloyed iron and puts every rotor through Thermal Stability Profiling, a process specifically aimed at handling the increased stress and heat generated under intense, repeated braking. That kind of metallurgical attention matters most exactly when a rotor is pushed hardest, which is precisely when a lesser rotor starts to warp or crack. It's the foundation that lets DBA back this rotor for genuinely hard use rather than just daily commuting. It's a straightforward improvement that's easy to appreciate once it's installed.

Kangaroo Paw Ventilation, Not Just Straight Vanes

DBA's patented Kangaroo Paw ventilation uses a series of 144 diamond and teardrop patterned pillars instead of a traditional straight-vane design, achieving up to a 30 percent increase in surface area and a 20 percent improvement in cooling efficiency. That's a meaningful, measurable difference in how effectively the rotor sheds heat during hard braking, not just a marketing name for a slightly different vane shape. Better cooling means more consistent pedal feel across a full track session or a long descent. That combination of durability and performance is what makes it worth the upgrade.

Straight From Subispeed

A rotor genuinely engineered for hard use on 2008-2014 WRX / 2008-2014 STI, with real, measurable cooling gains over a traditional straight-vane design.

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