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![Big Block Chevy Aluminum Cylinder Head for use with Hydraulic Roller Cam [335 cc Intake Ports]](https://www.jegs.com/images/mini_750/500/555/555-514071.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-514071
Big Block Chevy Aluminum Cylinder Head for use with Hydraulic Roller Cam [335 cc Intake Ports]
$1,04499$1149.99You Save$105.00
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Big Block 335 cc
Aluminum Cylinder HeadBig Block Chevy 335 cc Intake Ports 123 cc Combustion Chamber 2.250 in. Intake Valves 1.880 in. Exhaust Valves For Hydraulic Roller Cam 0.725 in. Maximum Lift Sold Individually
JEGS 555-514071 Big Block Chevy Aluminum Cylinder Head Features:
- 24-degree/4-degree intake valve angle
- 15-degree/4-degree exhaust valve angle
- Requires Guide plates, sold separately, we recommend Dart 27001230-4 or AFR 6110-1
- Requires 7/16 in. Rocker Arm Studs, sold separately
- Intake Port Location: Stock
- Intake Port Dimensions: 2.510 in. x 1.820 in. x 3/8 in. Radius
- Exhaust Port Location: 0.357 in. Raised
- Exhaust Port Dimensions: 1.690 in. x 1.900 in.
- Exhaust Port Volume: 140 cc
- Valve Seats Machined: Yes
- Valve Seat Machine Style: 3-Angle
- Valve Seat Material: Hardened Ductile Iron
- Valve Spring Pocket Diameter: 1.750 in. OD (Max Machining)
- Valve Spring Diameter: 1.460 in.
- Intake and Exhaust Valve Material: Stainless Steel
- Intake Valve Head Diameter: 2.250 in.
- Intake Valve Stem Diameter: .3415 in. - 11/32 in.
- Exhaust Valve Head Diameter: 1.880 in.
- Exhaust Valve Stem Diameter: .3415 in. - 11/32 in.
- Valve Length: Intake = +0.100 in. Longer than stock/ Exhaust = Stock Length
- Valve Locks: 7-degree
- Valve Retainers: Chromoly
- Intake Valve Guide Material: Manganese Bronze
- Exhaust Valve Guide Material: Phosphor Bronze
- Valve Guide Size: 1/2 in.
- Valve Guide clearance: .0014 in. - .002 in. (with 0.3415 in. Diameter valve stem)
- Spark Plug Dimensions: 14 mm x 0.750 in. with Gasket Seat
- Drilled for accessory hole
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Chevy Performance Right Out of the Box!
JEGS Chevy Aluminum Cylinder Heads bring racing technology to your high-performance street engine! We use the most up-to-date technology to design our intake & exhaust runners and combustion chambers for maximum performance. Our choices of CNC-ported, intake runner volumes, combustion chamber sizes, spark plug styles, and valve springs ensure that we have a cylinder head to suit your needs. Each JEGS cylinder head assembly has premium parts and hardware.
Part TypeCylinder Head
Product LineJEGS Chevy Small, Big Block Aluminum Cylinder Heads
BrandJEGS
Package Height8.1
Package Width11.1
Package Length24.4
Weight41.15 PG
Exhaust Valve MaterialStainless Steel
Retainers IncludedYes
Intake Port ShapeRectangular
Guideplates IncludedYes
Oiling StyleThrough pushrod
Valve Seats MachinedYes
Heat CrossoverNo
Intake Valve MaterialStainless Steel
Camshaft StyleHydraulic roller
Number Of Springs Per ValveDual
Spark Plug StyleStraight
Valve Stem Seals IncludedYes
Intake Valve Diameter2.250 in.
Valve Guide MaterialManganese bronze intake/Phosphorous bronze exhaust
Rocker Arm Studs IncludedYes
Retainer MaterialChromoly steel
Cnc-Machined Combustion ChamberNo
Exhaust Valve Diameter1.880 in.
Part CategoryPerformance Parts
Cylinder Head MaterialAluminum
Intake Port LocationStandard
Rocker Arm Nut Thread Size (In.)7/16"-20
Exhaust Valves IncludedYes
Locks IncludedYes
Engine Make/SizeChevy Big Block
Lock Style7 degree
Rocker Arms IncludedNo
Rocker Arm Nuts IncludedNo
Cylinder Head FinishNatural
Intake Valve Angle24/4
Maximum Valve Lift0.725 in (18.415 mm)
Valve Seat MaterialDuctile iron
Valve Springs IncludedYes
Valve Seat Machine Style3-angle
Valve Guides IncludedYes
Cnc-Machined Intake RunnerNo
Intake Valves IncludedYes
Combustion Chamber StyleHeart
QuantitySold individually
Accessory Bolt Holes DrilledYes
Exhaust Runner Volume (Cc)140
Exhaust Port LocationRaised
Combustion Chamber Volume (Cc)123
Machined For O-RingNo
Exhaust Valve Angle15/4
Cylinder Head StyleAssembled
Valve Stem Diameter0.3415 in.
Part FitmentSemi Universal
Valve Cover Mounting StylePerimeter bolt
Intake Runner Volume (Cc)335
Cnc-Machined Exhaust RunnerNo
Package Qty1
Package TypeEA
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