BB-Chevy Aluminum Heads 2.25" /1.88" Stainless Valves

Name: BB-Chevy Aluminum Heads 2.25" /1.88" Stainless Valves
Brand: JEGS
SKU: 555-51454
Price: 1066.99 USD
Availability: OutOfStock

Currently Unavailable

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

BB-Chevy Aluminum Cylinder Heads - 310cc Intake Ports, 119cc Combustion Chambers

2.25''/1.88'' Stainless Valves
1.550'' Springs, 130 lbs @ 2.000''
.680'' Max Lift, Mech. Flat Tappet/Hydraulic Roller Cams
Assembled, Sold as Each
1 available at this price, please call before ordering

JEGS Cylinder Head Specifications
Part # 51454 24.5 degree, BB-Chevrolet
Materials
Casting: A356-A Virgin Grade, Heat Treated to T-6
Valve Guides: Manganese Bronze
Valve Seats: Alloy, For use with Unleaded Gasoline
Combustion Chamber: 119cc As Cast
Intake
Port Volume: 310cc
Valve Diameter: 2.250' Stainless Steel # 555-20570
Valve Length: 5.350'
Valve Stem Diameter: 11/32'
Valve Stem Seal Diameter: .531' PTFE
Port Dimension: 2.450' x 1.750' Rectangular
Flow: 356 cfm @ .800' lift 28' of water
Gasket: JEGS # 555-210100
Exhaust
Port Volume: 142cc
Valve Diameter: 1.880' Stainless Steel, # 555-20575
Valve Length: 5.425'
Valve Stem Diameter: 11/32'
Valve Stem Seal Diameter: .531', PTFE
Port Dimension: 1.625' x 1.900' Modified 'D' Shape
Flow: 284cfm @ .800' lift 28' of water
Gasket: JEGS # 555-210150
Valve Train
Stud Size: 7/16', 7/16' 14 x .875'(bottom) 7/16' 20 x 1.950' (top), # 555-20526
Guide Plates: Big Block Chevrolet
Retainers: Chrome Moly Steel 10 degree, # 555-20531
Valve Locks: 10 degree
Pushrods: 3/8' Heat Treated, Must Check Length
Springs: 1.550' Spring, 2.000' installed height, .680' Maximum Lift, Flat Tappet, Hydraulic Roller, # 555-20545
Spring Cups: .570' Inside Diameter Locater, .060' thick # 555-20550
Accessories
Head Bolts: Exhaust Upper Row, 5 Bolts per Head Longer Use # 070-135-3612, Complete Kit # 070-135-3702
Head Studs: ARP # 070-235-4102
Spark Plug: 14mm 3/4' reach 5/8' Hex with Washer Seat
Stud Girdle: # 555-20518
Rocker Arms: Big Block Chevrolet
Head Gasket: Fel-Pro # 375-1017-1, JEGS # 555-210141 or equivalent for MarkIV Block, Fel-Pro # 375-17048 or equivalent for Gen V and Gen VI Block
Head Fastener Washers: Use Quality Hardened Washers
Accessory Bolt Locations: Stock Placement
Torque Specifications
Rocker Studs: 45 ft/lbs.
Manifold Bolts: 35 ft/lbs.
Head Fasteners: See Manufacturers Specifications