Wilwood GT Series straight vane rotors provide high-value performance and rugged durability for a wide range of competition, high performance, and sport driving applications. Don't confuse these rotors with bargain priced off-brand parts. Wilwood's modern manufacturing capability, combined with large-scale economies, makes it possible to offer this level of quality and performance at such an affordable price. They're cast from premium-grade, long-grain carbon iron. This material exhibits long wear, high thermal stability, and excellent resistance to distortion in extreme heat. Modern foundry and machining techniques hold close tolerances on face and vane thickness. Combining the correct face thickness with a vane casting provides superior heat management and long service life, with low rotating and unsprung weight. An asymmetrical GT groove pattern and the straight vane design also make it possible to use the same rotor on left or right hand mounting locations.