Xtreme Energy 250/256 Hydraulic Flat Cam for Chevrolet Small Block

Xtreme Energyª 250/256 Hydraulic Flat Tappet Cam for Chevy Small Block. Very strong torque with excellent mileage and a smooth idle. Xtreme Energy Camsª bridge the gap between Magnum street cams and race only cams. Xtreme Energy Camsª provide increased torque, vacuum, response, and power while still providing quiet operation of the valve train and the durability required in daily driven vehicles.Xtreme EnergyªBenefits:Quicker opening lobe profiles deliver increased responsiveness & more area under the lift curve More vacuum allows a step up in duration for greater performance Best seller; excellent all around performance in street carbureted applications Important Considerations:Work best with COMP Cams¨ roller rockers and matched valve springs Require other performance parts (intake manifold, headers, etc.) for best performance Dyno ResultsCamshaft Part #12-254-3Grind #XE294H-10Duration @ 0.006":294¡ / 306Duration @ 0.050":250¡ / 256¡Max Lift w/ 1.5RR: .519" / .523"Lobe Separation:110¡Lobe ID#'s:5449 / 5231Intake Centerline:106¡Engine Type:Chevrolet 350 Small BlockBore:4.040"Stroke:3.480"Displacement:356ciCompression:9.25:1Heads:Dart Sportsman IIIntake:Edelbrock Victor Jr.Carburetor:Holley 750 dbl. pmp.Exhaust:1 3/4" HeadersMax Torque:394 ft*lbs @ 4100 RPMMax Power:415 HP @ 5800 RPMManifold Vacuum:8" Hg @ 1000 RPM & 10.5" Hg @ 1200 RPM w/ no load.