The LSX454 cam is a high-lift, hydraulic roller that was originallydeveloped for our LSX454 crate engine. It maximizes the potential of big-displacement engines at high rpm. Maximum lift is 0.600/0.600" with 1.7-ratio rockers and 0.635/0.635" with 1.8-ratio rockers. Duration is 236 degrees on the intake side and 246 degrees on the exhaust side, with a 110-degree separation angle. NOTE: Not compatible with production-style variable-valve timing configurations or production valve springs.