Attributes . Stage 1: Dual cam engine.. Intake and exhaust cams sold separately.. No bottom-end loss with strong mid-range to top-end gains.. Cam uses stock auto-decompression mechanism.. Uses stock valve springs.. Exhaust Duration (Degrees at 1mm): 244.00. Exhaust Lift (mm): 7.98. Exhaust Lobe Center (Degrees): 97.50. Exhaust Valve Lash (mm) . Values