Founded in 2001 as the first manufacturer of aftermarket, performance billet camshafts for the dirt bike and ATV market. Today Hot Cams manufacturers almost 250 unique camshaft profiles in its Urbandale, Iowa facility. Stage 1: Single (or dual-cam) motor. True drop-in cam. No valve spring change needed. Improved acceleration, more bottom end, and no top-end loss. Detailed Specifications: Exhaust duration (degrees at 1 mm): 219.00. Exhaust lift (mm): 8.51. Exhaust lobe center (degrees): 105.00. Exhaust valve lash (mm): 0.15. Intake duration (degrees at 1 mm): 219.00. Intake lift (mm): 8.51. Intake lobe center (degrees): 105.00. Intake valve lash (mm): 0.15. Note: Stock valve springs are OK. Supplied with decompression mechanism.