Chevrolet LS1 Adv. Duration: 255/261 Duration @ .050": 208/214 Lift: .525/.525 Lobe Separation: 114LC Included Lifters: 91113 Hyd. Roller 1000-5600. Big torque in 4.8L, 5.3L, or 5.7L. Needs good intake and exhaust.
Chevrolet Gen III/IV LS Series 3-Bolt Adv. Duration: 274/274 Duration @ .050": 224/224 Lift: .612/.612 Lobe Separation: 115LC Included Lifters: 91113 Hyd. Roller 1800-6800. Turbo, Street/Strip performance, Good mid-range power.