BTR/BAM SOLID ROLLER LIFTER SET - STOCK BLOCK LS - B-2029-16 - A four column design for ultimate strength and rigidity while minimizing mass. - Triple alloy steel billet lifter bodies machined on start of the art CNC equipment. - Heat treated for maximum strength, hardness and straightness in ISO certified surfaces. - Pressure fed oiling provides continuous oil to the axle and roller bearing. - Additional reliefs on each interior side of the roller slot allow engine oil from the cam lobe face to lubricate the needle rollers.