COMP Cams Lifters 8991-16 Designed to fit an SB2 block with SB2 head and .874? lifter bore, these .300 taller Endure-X Solid Roller Lifters from COMP Cams are engineered to withstand the demands of aggressive cam lobe designs and increased RPM ranges. They feature a wear resistant tool steel axle, precision sorted needle bearings and EDM Oil Injection Technology that guarantees the bearing assembly receives a constant flow of oil. Endure-X Solid Roller Lifters are heat treated, machined to ultra-high tolerances and fully rebuildable. Endure-X Solid Roller Lifter Set for Chevrolet SB2 COMP Cams Endure-X Solid Roller Cutaway Lifters for GM SB2 Head, SB2 Block Applications with .875" Lifter Bores, .300" Tall, Set of 16 COMP Cams Roller Lifters SB2/SB2 .875in