Cylinder Head Big Block Chevy

Name: Cylinder Head Big Block Chevy
Brand: JEGS
SKU: 555-514060
Price: 1055.99 USD
Availability: OutOfStock

Currently Unavailable

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

290cc Intake Runner

Big Block Chevy
290cc Intake Ports
119cc CNC Ported Combustion Chambers
2.250" Int./1.880" Exh. Valves
1.550" Valve Spring, 0.650" Max Lift
7/16" Rocker Studs

Assembled, Sold Individually

Material
Casting	A356-A Virgin Grade, Heat Treated to T-6
Valve Guides	Manganese Bronze
Valve Seats	Alloy, For use with Unleaded Gasoline

Valve Train
Rocker Stud Size	7/16"-24
Guide Plates	3/8"
Pushrods	3/8" Hardened, *Must Check Length*
Spring Retainers	Chrome Moly Steel (7 Degree)
Valve Locks	7 Degree (HD)
Spring Locator	I.D. Locator - 1.570" x 0.060"
Valve Springs
Specifications				Pressure
Spring O.D.	Type	Max Lift	Coil Bind	Seat Load	Open Load
1.550"	Single	0.650"	1.150"	130# @ 1.880"	350# @ 1.280"

Accessories
Spark Plugs	14mm x 3/4" Reach - Gasket Seat - 5/8" Hex
Head Bolts *	ARP 070-135-3603 or equivalent
Head Studs *	ARP 070-235-4103 or equivalent
Stud Girdle	JEGS 555-20518 or equivalent
Rocker Arms	Standard Big Block Chevy for 7/16"-24 Stud
Head Gasket	JEGS 555-210142 or equivalent
Accessory Bolt Locations	Stock Placement

Flow Specifications
(Stainless Steel)	1.880" (Stainless Steel)
Valve Length	5.340"	5.350"
Valve Stem Diameter	11/32"	11/32"
Valve Stem Seal Diameter	0.530" (PTFE)	0.530" (PTFE)
Port Dimension	2.325"H x 1.625"W	1.780"H x 1.950"W
Flow Rate	378 CFM @ 0.700" Lift (28" H₂0)	265 CFM @ 0.700" Lift (28" H₂0)
Gasket	JEGS 555-210100 or equivalent	JEGS 555-210151 or equivalent

Torque Specification
Rocker Studs	45 ft/lbs.
Manifold Bolts	35 ft/lbs.
Head Bolts or Studs	Per Manufacturers Specifications

* Requires 4 longer bolts or studs over each exhaust port which are included in the recommended kits. The longer bolts and studs can also be purchased separately.

Racing technology for your high performance street engine! Our heads are cast from Virgin A356 Aluminum and heat treated to a T6 Hardness for the ultimate quality and durability. They are then machined on the latest CNC machines for accuracy and precision. We use the most up to date technology to design our intake and exhaust runners and combustion chambers for maximum performance. Our choices of intake runner volumes, combustion chamber sizes, spark plug styles and valve spring sizes insure that we have a cylinder head to suit your needs. Our cylinder heads are assembled with premium parts such as manganese valve guides, stainless steel valves and chrome-moly retainers. They feature valve seats that are compatible with unleaded fuel.

Cast in the U.S.A.
Machined in the U.S.A.
Assembled in the U.S.A.
3-Angle Competition Valve Job
Improved Combustion Chamber Design For Improved Efficiencies
Latest In Port Design For Both The Intake and Exhaust For Increased Horsepower and Torque
Exhaust Ports Raised .300"
Premium parts and hardware
Up to 20 lbs. lighter per head than standard cast iron heads