Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Product Discontinued
Currently Unavailable
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
Bow Tie Large Port Vortec Cylinder HeadsSmall Block Chevy Sold Individually
- Large Port Cast Iron Vortec Cylinder Head
- Bare
- Intake Ports: 225cc
- Exhaust Ports: 77cc
- Combustion Chambers: 65cc
- 1/pkg
- Parts and assembly required
- Use early model Intake Manifold 809-10185063 or, for best results, Vortec Intake Manifold 809-12496820, 809-12366573, 809-12496822, or 809-12496821 (Vortec Intake Manifold 3-step torque specs: 2 ft/lbs, 9 ft/lbs, 11 ft/lbs)
- Use Intake Manifold Gaskets 809-12497760 (Dual bolt pattern)
- Use Exhaust Gaskets 375-1470 (Trimming may be necessary)
- Small Block Chevy Bow Tie Large Port Cast Iron Vortec Cylinder Heads are Chevrolet Performance's most powerful cast iron cylinder head designed for street or race applications in the 400-450 horsepower range. As upgraded production heads, they have a thicker deck surface, large runners, bigger valves, and combustion chambers with exceptional low-lift flow numbers. These cylinder heads provide Chevy's Fast Burn performance in an affordable cast iron option.
- Cast iron
- No heat risers
- Intake Ports: 225cc
- Exhaust Ports: 77cc
- Combustion Chambers: 65cc
- Improved airflow (281 cfm at .600'')
- Deck Thickness: .450''
- Hardened exhaust valve seats
- Machined for 2.00''/1.55'' valves
- Popular in short track racing
- Drilled & tapped for 7/16''-14 screw-in studs
- .530'' maximum valve lift without modification
- Cast Logos: Vortec (intake port roof), GM (intake port floor), Bow Tie (exhaust side)
- Dual bolt patterns for: perimeter and centerbolt valve covers & early model and Vortec intake manifolds
JEGS Easy Kits are designed by JEGS professionals so you get all the parts you need.
Features
Part TypeCylinder Head
Product LineChevrolet Performance Small Block Chevy Large Port Vortec Cylinder Heads
BrandCHEVROLET PERFORMANCE
Package Height9.0
Package Width10.0
Package Length505.46
Weight45.05 PG
Part CategoryPerformance Parts
Overall Width (In)7.85
Overall Width (Mm)199.39
MaterialCast Iron
Intake Valve Diameter50.8
Deck Thickness0.45
Valve Angle (Deg)23
Rocker Stud Diameter (In)0.438
Guide Plates IncludedNo
Combustion Chamber Volume4.0
Rocker Stud Diameter (Mm)11.113
Valve Spring Maximum Lift13.462
Intake Runner Volume225
Grade TypePerformance
Exhaust Valve Diameter1.55
Vendor Part Number25534445
Package Qty1
Package TypeEA
No Questions
No Reviews
Some parts are not legal for use in California or other states with similar laws / regulations
