Xtreme Energyª 224/230 Hydraulic Roller 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.ÊIncludes Cam, Lifters, & Timing SetXtreme 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 #12-423-8Grind #XR276HR-10Duration @ 0.006":276¡ / 282¡Duration @ 0.050":224¡ / 230¡Max Lift w/ 1.5RR: .502" / .510"Lobe Separation:110¡Lobe ID#'s:3314 / 3315Intake Centerline:106¡Engine Type:Chevrolet 350 Small BlockBore:4.040"Stroke:3.480"Displacement:356ciCompression:9.25:1Heads:Dart S/RIntake:Edelbrock performerCarburetor:Holley #3310 Vac. Sec.Exhaust:1 5/8" HeadersMax Torque:427 ft*lbs @ 3700 RPMMax Power:373 HP @ 5200 RPMManifold Vacuum:12" Hg @ 800 RPM & 14" Hg @ 1000 RPM w/ no load.