Performer RPM454-R Rectangle Port Aluminum Cylinder Head for Big Block Chevy

Vehicle Info Needed

EDELBROCKPART NUMBER: 350-60555

Performer RPM454-R Rectangle Port Aluminum Cylinder Head for Big Block Chevy

Name: Performer RPM454-R Rectangle Port Aluminum Cylinder Head for Big Block Chevy
Brand: EDELBROCK
SKU: 350-60555
Price: 1394.95 USD
Availability: InStock

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Performer RPM Aluminum Cylinder Heads - Rectangle Port

Big Block Chevy 396-502ci
Rectangle Port
Valve Springs for Hydraulic Roller
Port Volume: 315cc/110cc
Valve Size: 2.19"/1.88"
118cc Combustion Chambers
Max Lift: .700"
Assembled, Sold Individually

Performer RPM rectangular-port heads have specially designed intake and exhaust ports for increased flow and velocity over standard big-block heads. These heads feature a highly-efficient 118cc open-style combustion chamber for maximum performance. Engineered with high-velocity 315cc long and 300cc short intake runners, they are designed for street/high-performance big-block Chevys operating from 2500-7000 rpm. The stainless steel, hardened tip 2.19' intake and 1.88' exhaust valves have smaller-than-stock 11/32' valve stems to promote excellent flow and lighter valve weight. The deck surface and water jackets were specially designed to work with all big-block Chevrolet engine blocks. Heads include top-quality ARP rocker studs, bronze guides and hardened, ductile iron valve seats.

Tech Note: The Spark plug is closer to center of bore, for use with flat top or low dome pistons and will interfere with high-dome pistons for open chamber heads. If a high compression domed piston is to be used, purchase a piston designed for use with this Edelbrock cylinder head.

Tech Tip: To gain more spark plug clearance, Edelbrock recommends using Champion RC Series plugs such as the RC12YC. They are 0.230' shorter than a conventional spark plug and have a 5/8' hex for easier access.
Designed for street/high-performance big-blocks operating from 2500-7000 rpm
Specially designed ports for increased flow and velocity over standard big-block heads
Highly-efficient 118cc open-style combustion chamber
High-velocity 315cc long/300cc short intake ports

Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight

Combustion Chamber Volume:	118cc
Intake Runner Volume:	315cc
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

Valve Lift	Intake	Exhaust
.100'	76	70
.200'	146	132
.300'	212	156
.400'	255	181
.500'	294	207
.600'	314	228
.700'	N/A	N/A
Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28' H2O

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

Part TypeCylinder Head

BrandEDELBROCK

Package Height9.0

Package Width11.8

Package Length24.3

Weight44.27 PG

Retainers IncludedYes

Guideplates IncludedYes

Oiling StyleThrough pushrod

Valve Seats MachinedYes

Heat CrossoverNo

Number Of Springs Per ValveDual

Damper Spring IncludedYes

Cylinder Head TypeRectangular Port

Valve Stem Seals IncludedYes

Intake Valve Diameter2.19 in (55.626 mm)

Valve Guide MaterialManganese bronze

Outside Diameter Of Outer Spring1.54 in (39.1 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

EmissionN/A

Exhaust Valves IncludedYes

Locks IncludedYes

Engine Make/SizeChevy Big Block (396-502)

Lock Style7 degree

Rocker Arms IncludedNo

Rocker Arm Nuts IncludedNo

Cylinder Head FinishNatural

Intake Valve Angle26

Maximum Valve Lift0.775 in (19.685 mm)

Valve Seat MaterialDuctile iron

FinishCast Aluminum

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)118

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)315cc/300

Cnc-Machined Exhaust RunnerNo

Vendor Part Number60555

Package Qty1

Package TypeEA

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EDELBROCK