Un used comp hydraulic cam and lifters for Small Block. Cam still in the plastic. Never opened. Lifters never opened. Bought this cam and lifter set and decided to go with a solid kit. Pn# 20-224-16/ XE274H. Adv. duration 274/286. At.50 230/236. 110 lobe separation. Lift 488/491. Asking 1/2 of...