Wilwood Ultralite HP 30 straight vane rotors offer an excellent balance of efficient cooling and long service life with low rotating and unsprung weight. Designed for street use, these HP 30 vane rotors can successfully handle moderate racing use. Wilwood Ultralite rotors are cast from premium-grade, long-grain carbon iron--a material that exhibits long wear, high thermal stability, and resistance to distortion in high heat. Plus, the straight vanes make it possible to use the same rotor on the left or right hand mounting brackets. Experience added performance and smoother operation with precision Wilwood Ultralite HP 30 vane rotors.