JEGS Small Block Chevy Vortec Cast Iron Cylinder Head | Made In USA | 1 Per Package | Straight Spark Plug | 1.94” Intake / 1.5” Exhaust Valve | 170cc Intake Ports | .475” Max Lift

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JEGS Small Block Chevy Vortec Cast Iron Cylinder Features

• FITS ALL 1955-Present GM small blocks except LT1, LT4, and LS1-style engines

• UTILIZES FAST BURN COMBUSTION CHAMBERS and high-velocity intake and exhaust ports

• PERFORMS GREAT RIGHT OUT OF THE BOX and can be mildly ported and milled up to 0.040 inch

• REQUIRES A VORTEC-STYLE INTAKE MANIFOLD to complete installation

• SPECIFICATIONS: 1.94” intake / 1.5” exhaust valve, 170cc intake ports, .475” max lift, straight spark plug design, 3/8 “ rocker arm studs, 64cc combustion chambers, 1.25” valve springs

About JEGS Small Block Chevy Vortec Cast Iron Cylinder

Small Block Chevy Cast Iron Vortec Cylinder Head170 cc Intake Ports64 cc Combustion Chambers1.94 in. Intake, 1.50 in. Exhaust Valves1.250 in. Valve Springs, 0.475 in. Max Lift3/8 in. Rocker StudsStraight PlugSold Individually JEGS 514080 Cast Iron Vortec Cylinder Head for Small Block Chevy with 170cc Intake Runners is a bolt-on replacement for the 1996-2002 Chevy 5.7L Truck Engines. MaterialCastingIronValve GuidesIntegralValve SeatsSteelValve TrainRocker Stud Size3/8"-24Guide PlatesNot IncludedPushrods5/16" Hardened, Must Check LengthSpring RetainersChrome Moly Steel (7 Degree)Valve Locks7 Degree (HD)Spring LocatorI.D. Locator - 1.253" x 0.120"Valve SpringsSpecificationsPressureSpring O.D.TypeMax LiftSeat LoadSolid Height1.250"Single0.475"80# @ 1.700"1.200"AccessoriesSpark Plugs14mm x 3/4" Reach - Gasket Seat - 5/8" HexHead BoltsJEGS 555-83400 or equivalentHead StudsStandard SB-ChevyStud GirdleJEGS 555-20510 or equivalentRocker ArmsSelf-Aligning SB-Chevy for 3/8"-24 StudHead GasketJEGS 555-210041 or equivalentAccessory Bolt LocationsStock PlacementFlow Specifications IntakeExhaustPort Volume170cc61ccValve Diameter1.940"1.500"Valve Length4.910"4.910"Valve Stem Diameter11/32"11/32"Valve Stem Seal Diameter0.500" (Rubber)0.500" (Rubber)Port Dimension1.080"H x 2.000"W1.500"H x 1.580"W (Rectangular)Flow Rate211.37 CFM @ 0.500" Lift (28" H20)157.41 CFM @ 0.500" Lift (28" H20)GasketJEGS 555-210003 or equivalentJEGS 555-210050 or equivalentTorque SpecificationRocker Studs45 ft/lbs.Manifold Bolts11 ft/lbs.Head Bolts or StudsPer Manufacturers...