DBA 18-21 Subaru WRX STI Front 5000 Series Replacement Ring

This product is a replacement brake rotor ring for the front of your 2018 or 2021 Subaru WRX, specifically designed to work with DBA's 5000 Series 2-piece brake rotor assemblies. It's the part of the rotor that actually contacts your brake pads, and it's made from high-carbon cast iron for solid performance. This is the HD variant, meaning it has a smooth OE-style finish, which is popular if you want the performance benefits of a 5000 Series rotor without slots or drilled holes.

DBA's 5000 Series rotors are built as a composite 2-piece design. This particular item is just the cast iron ring, intended to be bolted onto the aerospace-grade aluminum hat if you already have a DBA 5000 Series assembly. The aluminum hat, which is sold separately or as part of a complete assembly, helps reduce unsprung weight and manage heat better than a traditional one-piece rotor. This design allows the cast iron ring to expand evenly as it heats up, and the aluminum hat minimizes heat transfer to your wheel hub. These are recommended for high-performance street use, track days, and club racing.