SLP Camshaft, LS1/LS6/LS2 Hydraulic Roller (Call for specs) Designed specifically for our ZL402 LS1 Gen III and LS2 Gen IV stroker engines, this camshaft will make the most power for these engines. NOTES: Custom PCM reprogramming required, not included. We STRONGLY recommend final installation and tuning be performed by an experienced, professional mechanic.. This camshaft has a 3 bolt core and will only work on a 3 bolt cam sprocket. 2007 and later LS2 engines have a single bolt core cam and cannot use this camshaft. Camshaft Specs: Valve Lift (1.7) Duration@.006 Duration@.050 int: .596" 303º 250º ex: .596" 299º 246º Centerline - 114º Lobe Separation - 114º Lobe Lift - .351" Timing @ .050: Open Close int: 11º BTDC 59º ABDC ex: 57º BBDC 9º ATDC