The DBA 4000 Series plain rear rotor for 2003–2013 Subaru WRX with STI calipers and a 170mm handbrake is the HD plain-face variant offering a smooth OE-style finish. It provides direct-replacement fitment for the specified application and is aimed at drivers seeking the braking characteristics of the 4000 Series with a controlled, factory-like appearance useful in regulated race divisions or street setups requiring an OE look.
DBA 03-13 Subaru WRX (w/STI Calipers & 170mm Handbrake) Rear 4000 Series Plain Rotor