Wilwood GT 48 Curved Vane Spec-37 Rotor - LH - 1.25" Width - 12.19" Diameter - 8 x 7.00" Bolt Circle - .316" Hole - 12.7 lbs. 725075 The MSD Module Holders are

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Wilwood GT 48 Curved Vane Spec-37 Rotor - LH - 1.25" Width - 12.19" Diameter - 8 x 7.00" Bolt Circle - .316" Hole - 12.7 lbs. 725075 The MSD Module Holders areWilwood'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