Wilwood Ultra-Light UL32 curved vane rotors provide an excellent balance of efficient cooling with lower rotating mass high suitable for a wide range of competition, high performance and sport driving applications. Don't confuse these rotors with bargain priced off-brand named parts. Wilwood's modern manufacturing capability, combined with large scale economy, make it possible to offer this level of quality and performance at such an affordable price.Superb value for moneyIdeal for street or competition useMade from premium grade, long grain carbon iron for longevity and resistance to warpingCurved vanes provide increased cooling efficiencyEvery Wilwood rotor is cast from premium grade, long grain carbon iron. This material exhibits long wear, high thermal stability and excellent resistance to distortion in high heat. Modern foundry and machining techniques hold close tolerances on face and vane thickness. Combining the correct face thickness with a 32 vane casting provides superior he