Wilwood's C10 Steel ProSpindle Kits contain a pair of one piece spindles and integrated steering arms for 63-87 Chevrolet & GMC 2WD C10/C15 Pickups, Blazers and Suburban's, dependent on part number. Specifically designed for use with Wilwood's disc brake kits and with a 2.50" drop for a more aggressive stance without affecting steering geometry. Constructed from a proprietary grade of cast steel with a traditional bearing snout that supports Wilwood kit specific hubs in both 5 x 4.75" and 5 x 5.00" or 6 x 5.50" wheel bolt circles.