Made in USA
Performer High-Compression 454-O Oval Port Cylinder Head for Big Block Chevy
Product Discontinued
EDELBROCKPART NUMBER: 350-604919

Performer High-Compression 454-O Oval Port Cylinder Head for Big Block Chevy

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This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

Performer High-Compression Cylinder Heads
  • 1987-95 Big Block Chevy 454ci TBI
  • Valve Springs for Hydraulic Flat Tappet
  • Port Volume: 290cc/110cc
  • Valve Size: 2.19"/1.88"
  • 100cc Combustion Chambers
  • Assembled, Sold Individually
  • Polished Finish


    Designed for 1987-95 TBI-equipped big-blocks, these new 50-state emissions legal (E.O. #D-215-33) heads have a 100cc combustion chamber for an increase of over one full point of compression to 8.8:1 on 7.4L TBI engines. The result is a dramatic performance improvement in these late-model vehicles. These heads and our Multi-Point EFI on a 7.4L engine made 353 hp and 457 ft/lbs. of torque on the dyno. Available assembled with top-quality components that include 1-piece, stainless steel, 2.19' intake and 1.88' exhaust valves, ARP 7/16' diameter rocker studs and ductile iron seats with a three-angle valve job. Features include stock port locations and 9/16' thick decks for superior gasket retention. Mark IV rocker arms and valve train parts are required.

    Tech Tip: To gain more spark plug clearance, Edelbrock recommends using Champion RC Series plugs such as the RC12YC (P/N 192-49776). They are 0.230' shorter than a conventional spark plug and have a 5/8' hex for easier access.

    Valve LiftIntakeExhaust
    .100'7371
    .200'143128
    .300'207153
    .400'251178
    .500'284200
    .600'299218
    .700'N/AN/A
    Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28' H2O

    Since founder Vic Edelbrock Sr. began building performance intake manifolds in 1938, Edelbrock has grown into one of the most trusted names in American high-performance parts, from carburetors and intake manifolds to cylinder heads, crate engines, and EFI systems. JEGS has spent decades supplying Edelbrock components to racers, engine builders, and street enthusiasts, backing this extensive lineup with in-house technical support, fast shipping, and a Price Match Guarantee so you can choose proven Edelbrock parts with confidence.

    Street Legal Performer 454 Oval Cylinder Heads
    These oval port heads will support over 540 HP with 9.5:1 compression with the right combination! Unique oval intake port shape produces flow similar to rectangular ports, but the smaller port size provides excellent seat-of-the-pant performance and crisp throttle response. Semi-open chamber design maximizes efficiency with streetable compression ratios. The smaller-than-stock 11/32'' valve stems provide excellent flow and lighter valve weight.

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    Combustion Chamber Volume:110cc
    Intake Runner Volume:290cc
    Exhaust Runner Volume:110cc
    Intake Valve Diameter:2.19''
    Exhaust Valve Diameter:1.88''
    Valve Stem Diameter:11/32''
    Valve Guides:Manganese Bronze
    Deck Thickness:9/16''
    Valve Spring Diameter:1.55''
    Valve Spring Maximum Lift:0.700''
    Rocker Stud:7/16''
    Guideplate:Hardened Steel
    Pushrod Diameter:3/8''
    Valve Angle:26°
    Exhaust Port Location:Stock
    Spark Plug Fitment:14mm x 3/4'' Reach,
    Gasket Seat

    Performer High Compression 454 Oval Cylinder Heads
    These heads have a 100cc semi-open chamber heads and feature a 1-1/2° rolled over (angle milled) design that improves intake port alignment and provides a smaller combustion chamber without shrouding the valves. They have a 9.2:1 compression with flat-top pistons, making them an outstanding high performance street head. They also have an 8.8:1 compression ratio when used on 1987-Up TBI-equipped 7.4L dished piston motors. These heads produced over 450 ft/lbs torque when combined with Edelbrock's Multi-Point EFI System!

    Combustion Chamber Volume:100cc
    Intake Runner Volume:290cc
    Exhaust Runner Volume:110cc
    Intake Valve Diameter:2.19''
    Exhaust Valve Diameter:1.88''
    Valve Stem Diameter:11/32''
    Valve Guides:Manganese Bronze
    Deck Thickness:9/16''
    Valve Spring Diameter:1.55''
    Valve Spring Maximum Lift:0.700''
    Rocker Stud:7/16''
    Guideplate:Hardened Steel
    Pushrod Diameter:3/8''
    Valve Angle:26°
    Exhaust Port Location:Stock
    Spark Plug Fitment:14mm x 3/4'' Reach,
    Gasket Seat
Part TypeCylinder Head
Product LineEdelbrock Big Block Chevy Performer Cylinder Heads
BrandEDELBROCK
Package Height8.5
Package Width11.0
Package Length26.0
Weight43.5 PG
Retainers IncludedYes
Guideplates IncludedYes
Oiling StyleThrough pushrod
Valve Seats MachinedYes
Heat CrossoverYes
Number Of Springs Per ValveDual
Damper Spring IncludedNo
Cylinder Head TypeStandard
Valve Stem Seals IncludedYes
Intake Valve Diameter2.19 in (55.626 mm)
Valve Guide MaterialManganese bronze
Outside Diameter Of Outer Spring1.55 in (39.4 mm)
Steam Holes DrilledNo
Rocker Arm Studs IncludedYes
Retainer MaterialSteel
Cnc-Machined Combustion ChamberNo
Exhaust Valve Diameter1.88 in (47.752 mm)
Part CategoryPerformance Parts
Cylinder Head MaterialAluminum
Intake Port LocationStandard
Rocker Arm Nut Thread Size (In.)7/16"-20
Emission50 State Legal
Exhaust Valves IncludedYes
Locks IncludedYes
Engine Make/SizeChevy Big Block (396-502)
Lock Style7 degree
Rocker Arms IncludedNo
Rocker Arm Nuts IncludedNo
Cylinder Head FinishPolished
Intake Valve Angle26
Maximum Valve Lift0.7 in (17.78 mm)
Valve Seat MaterialDuctile iron
FinishPolished
Valve Springs IncludedYes
UsageStreet/Hi-Performance
Valve Seat Machine Style3-angle
Valve Guides IncludedYes
Cnc-Machined Intake RunnerNo
Intake Valves IncludedYes
Combustion Chamber StyleSemi-open
QuantitySold individually
Accessory Bolt Holes DrilledYes
Exhaust Runner Volume (Cc)110
Exhaust Port LocationStandard
TypeComplete
Combustion Chamber Volume (Cc)100
Machined For O-RingNo
PreparationBolt On (Not Required)
Cylinder Head StyleAssembled
Part FitmentSemi Universal
Valve Cover Mounting StylePerimeter bolt
Valve Stem Seal StylePositive stop
Intake Runner Volume (Cc)290
Cnc-Machined Exhaust RunnerNo
Vendor Part Number604919
Package Qty1
Package TypeEA
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