Welded Lobe Cam for Modified Classes. This cam has a .278 lift and has maximum open valve duration (Duration at 50 - 258.8 Degree, Duration at 200 - 158.1) Max RPMs 8200-8400 Spring Pressure recommended IN/EX 32lbs Be careful with ratio rockers with this cam. The ratio combined with the monster duration of this cam may leave the valve open too long.This cam has very aggressive ramps and requires an upgraded spring package, billet rod, and flywheel. Use bored stock or Tillotson carb. Great cam if you have a lift check requirement but want maximum open valve duration.Engine: 196cc OHV CloneRecommended Class: ModifiedTarget (MAX) RPM: 8200-8400Spring Pressure (In / Ex): 32 lbsValve Lash (IN/EX): .003"Ignition Timining: 32 Deg BTDCINTAKELIFT: .278Dur @ .050": 258.7 Deg. C/L: 108 ATDCEXHAUSTLIFT: .278DUR @ .050": 258.6 Deg.C/L: 110 BTDCTHE LOBES ON THIS CAM ARE WELDED.Processed and ground by the hard working employees of DynoCams in the USA.