... countersunk which reduces heat build up.7:Method of manufacturing: one kind is normal turning, second ... No,DBA No, and the drawings etc Samples of the productsThe Normal brake rotor by turning.The ... .GG20,HT250,Ductile iron etcCar MakeAmerican Cars,Japanese cars,European Car etcHardness180-240HBPackingplastic bags + kraft paper box ... at iefriction dot com High quality Japanese car Brake rotor for Honda