Wilwood GT 48 Curved Vane Rotor - 12.90" Diameter - 12 x 8.75" Bolt Circle (Thru Bolt) - 1.25" Rotor Thickness - LH - 11.7 lbs. GMRS-BASE Crafted from billet aluminum then

Crafted from billet aluminum then black anodized

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Chevrolet: Silverado 2500 99 - 14 5

Edelbrock matched parts are now available under one part number

Wilwood GT 48 Curved Vane Rotor - 12.90" Diameter - 12 x 8.75" Bolt Circle (Thru Bolt) - 1.25" Rotor Thickness - LH - 11.7 lbs. GMRS-BASE Crafted from billet aluminum thenWilwood's GT 48 Curved Vane Spec 37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision