JEGS Performance Products#555-514040Cylinder Head
JEGS Performance Products 514040 - JEGS Small Block Chevy Cylinder Heads Details
210cc Intake Runner
A356-A Virgin Grade, Heat Treated to T-6
Alloy, For use with Unleaded Gasoline
Rocker Stud Size
5/16" Hardened, Must Check Length
Chrome Moly Steel (7 Degree)
7 Degree (HD)
I.D. Locator - 1.490" x 0.060"
135# @ 1.800"
340# @ 1.200"
14mm x 3/4" Reach - Gasket Seat - 5/8" Hex
JEGS 555-83400 or equivalent
JEGS 555-20510 or equivalent
Standard SB-Chevy for 3/8"-24 Stud
JEGS 555-210041 or equivalent
Accessory Bolt Locations
Valve Stem Diameter
Valve Stem Seal Diameter
2.150"H x 1.300"W
1.530"H x 1.545"W (D-Shape)
291 CFM @ 0.700" Lift (28" H20)
216 CFM @ 0.700" Lift (28" H20)
Head Bolts or Studs
Per Manufacturers Specifications
Racing technology for your high performance street engine! Our small block Chevy cylinder 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 and also accept both standard and center bolt valve covers.