BBC E-Street Big Block Chevy Cylinder Head, 290cc Oval Port, , Cylinder Head. Sold as single Assembled.

The Edelbrock 50459 E-Street cylinder Heads 290 Oval Port heads are designed for BBC Big Block Chevy motors. American made quality and affordable performance, These heads feature as-cast ports and are designed for entry-level application and replacements. 

Combustion Chamber Volume (cc):   110

Intake Runner Volume (cc):   290cc

Exhaust Runner Volume (cc):   110cc

Cylinder Head Style:   Assembled

Cylinder Head Material:   Aluminium

Intake Port Shape:  Oval

Intake Valve Diameter (in.):   2.190 in.

Intake Port Location:  Standard

Exhaust Port Shape:   D-port

Exhaust Port Location:  Standard

Spark Plug Style:  Angle

Exhaust Valve Diameter (in.):  1.880 in.

Maximum Valve Lift (in.):   0.700 in.

Camshaft Style:  Hydraulic flat tappet

Outside Diameter of Outer Spring (in.):   1.550 in.

Damper Spring Included:  No

Number of Springs Per Valve:  Dual Valve Springs

Lock Style:  7 degree

Valve Stem Seal Style:  Umbrella

Rocker Arm Studs Included:  Yes

Rocker Arm Thread Size:  7/16 in.-20

Guide plates Included:  Yes

Guide plate Pushrod Size:  3/8 in.

Valve Cover Mounting Style:  Perimeter bolt

Accessory Bolt Holes Drilled:  Yes

Intake Valve Angle:  26

Exhaust Valve Angle:  26

Valve Guide Material:   Manganese bronze

Valve Seat Machine Style:  3-angle

Valve Seat Material:   Powdered metal

Cylinder Head Colour:   Natural

Steam Holes Drilled:  No

Quantity:   Sold individually.

Notes:

Designed for use with hydraulic flat tappet camshafts. The valve and seat combination, used in these heads, is not recommended for use with a hydraulic or mechanical roller camshaft.