Assembled Aluminum Cylinder Heads for Big Block Chevy 396/402 / 427/454 / 496/502 305cc/119cc - Hydraulic Roller Compatible, Springs/Valves/Retainers Installed, Bolt - Speedmaster PCE281.2036

Brand:SpeedmasterPart Number:PCE281.2036Part Type:Cylinder Head [Assembled]Product Line:Hydraulic Roller TappetCylinder Head Style:AssembledCylinder Head Material:AluminumCylinder Head Finish:NaturalCombustion Chamber Volume (cc):119 ccCNC-Machined Combustion Chamber:NoIntake Runner Volume (cc):305 ccExhaust Runner Volume (cc):n/aCNC-Machined Intake Runner:NoCNC-Machined Exhaust Runner:NoIntake Port Shape:OvalIntake Port Location:StandardExhaust Port Shape:RectangularExhaust Port Location:RaisedSpark Plug Style:AngleComp. Valve Job:NoIntake Valves Included:YesIntake Valve Diameter (in):2.250 in.Exhaust Valves Included:YesExhaust Valve Diameter (in):1.880 in.ÊValve Springs Included:YesMaximum Valve Lift (in):0.580 in.Outside Diameter of Outer Spring (in):1.450 in.Damper Spring Included:YesNumber of Springs Per Valve:DualRetainers Included:YesRetainer Material:Chromoly steelLocks Included:YesLock Style:10 degreeValve Stem Seals Included:YesValve Stem Seal Style:Positive stopRocker Arm Studs Included:NoRocker Arms Included:NoRocker Arm Nuts Included:NoGuideplates Included:NoValve Cover Mounting Style:Center & Perimeter BoltAccessory Bolt Holes Drilled:YesIntake Valve Angle:24 deg.Exhaust Valve Angle:15 deg.Valve Guides Included:YesValve Guide Material:BronzeValve Seats Machined:YesValve Seat Machine Style:3-angleValve Seat Material:Ductile ironSteam Holes Drilled:NoOiling Style:Through pushrodMachined for O-Ring:NoHeat Crossover:NoQuantity:Sold as a pair.

• [FLOWS BIG, BUILDS POWER] Aluminum 305cc intake runners deliver high-velocity charge for strong mid-range and top-end power on your Big Block Chevy - matched to hydraulic roller cam profiles for street/strip builds.
• [FITS Big Block Chevy 396 / 402 / 427 / 454 / 496 / 502] Direct bolt-on for standard-deck blocks with stock head bolt pattern. Verify pushrod length and intake manifold port match before final torque.
• [ASSEMBLED & READY] Springs, retainers, locks, valves, valve seals, and guide plates installed. 119cc combustion chambers paired with stainless intake/exhaust valves. Just bolt on, gasket, torque, and run.
• [PREMIUM ALUMINUM CONSTRUCTION] Precision-cast aluminum for weight savings and improved heat dissipation vs cast iron. Hardened seats, machined for stud-mount rockers, ready for high-RPM use.
• [SHIPS AS A PAIR] Set of 2 fully assembled cylinder heads, matched and ready for installation. Head gaskets, head bolts/studs, intake gaskets, and rocker arms sold separately.