Edelbrock 60459 BBC Proformer RPM Cylinder Heads, 290cc/110cc, Oval Port, Assembled, Each

$1,233.50
MSRP: $1,610.64
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SKU:
EDE60459
MPN:
60459
Condition:
New
Weight:
44.35 LBS
Shipping:
Calculated at Checkout

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Identical to street legal 454-O cylinder Head, but with deleted exhaust crossover passage for more power. High-performance oval port head can help produce over 540 horsepower with 9.5:1 compression when used with the proper matching components. Intake valves are 2.19", exhaust valves are 1.88" and both are lighter, with smaller diameter (11/32") stems than original valves. Semi-open combus-tion chamber provides exceptional combustion efficiency with streetable compression ratios. Sold individually, bare or com-pletely assembled.
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast aluminum
Cylinder Head Finish:
Natural
CNC-Machined Combustion Chamber:
No
Combustion Chamber Volume (cc):
110cc
Combustion Chamber Style:
Semi-open
CNC-Machined Intake Runner:
No
Intake Runner Volume (cc):
290cc
Intake Port Shape:
Oval
Intake Port Location:
Standard
Intake Valve Angle:
26 degree
CNC-Machined Exhaust Runner:
No
Exhaust Runner Volume (cc):
110cc
Exhaust Port Shape:
D-port
Exhaust Port Location:
Standard
Exhaust Valve Angle:
26 degree
Intake Valves Included:
Yes
Intake Valve Diameter (in.):
2.190 in.
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.880 in.
Valve Type:
Stainless
Maximum Valve Lift (in.):
0.700 in.
Valve Springs Included:
Yes
Valve Spring Type:
Dual
Outside Diameter of Outer Spring (in.):
1.550 in.
Valve Guides Included:
Yes
Valve Guide Material:
Manganese bronze
Valve Seats Machined:
Yes
Valve Seat Material:
Ductile iron
Valve Seat Machine Style:
3-angle
Retainers Included:
Yes
Retainer Material:
Steel
Valve Stem Seals Included:
Yes
Valve Stem Seal Style:
PTFE Positive stop
Locks Included:
Yes
Lock Style:
7 degree
Camshaft Style:
Hydraulic flat tappet
Spark Plug Style:
Angled
Guideplates Included:
Yes
Guideplate Pushrod Size:
3/8 in.
Rocker Arm Studs Included:
Yes
Rocker Arm Nut Thread Size:
7/16-20 in.
Accessory Bolt Holes Drilled:
Yes
Valve Cover Mounting Style:
Perimeter bolt
Heat Crossover:
No
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Quantity:
Sold individually.
Notes:
For Hydraulic flat tappet camshafts. If using a domed piston check clearance before final assembly, spark plug location has been moved .150 closer to bore center, with a semi-open chamber design.
Make:
Chevrolet
Engine Family:
Chevy big block Mark IV
Engine Sizes:
6.5L/396-7.4L/454
Years:
1966-1990
Engine Family:
Chevy big block Gen V
Years:
1991-1995
Engine Family:
Chevy big block Gen VI
Years:
1996-2000
Engine Sizes:
7.4L/454