The DBA 4000 Series plain front rotor for 1988–1995 Alfa Romeo Spider is a direct-replacement rotor cast from XG-150 high-carbon alloyed iron and treated with Thermal Stability Profiling to resist stress and heat during repeated heavy braking. DBA's Kangaroo Paw ventilation uses 144 diamond and teardrop pillars to boost surface area up to 30% and improve cooling efficiency about 20% versus straight-vane designs; the HD plain finish provides a smooth OE-style appearance useful in controlled race divisions.
DBA 88-95 Alfa Romeo Spider Front 4000 Series Plain Rotor