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Bowtie Rectangular-Port BBC Aluminum Bare Cylinder Head

$1,036.20

  • Bare aluminum performance head
  • 300ccintake/ 110cc exhaust ports
  • Machined for 2.250″/1.880″ valves
  • 118cc combustion chambers
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SKU: 19331426 Categories: ,

Bowtie Rectangular Port Aluminum Bare Cylinder Head for Big-Block Chevy

  • Bare aluminum performance head
  • Machined for 2.250″/1.880″ valves
  • 300cc rectangular intake port
  • 110cc exhaust port
  • 118cc combustion chamber

Technical Notes:

  • Made from 356-T6 aluminum
  • Available in rectangular- or oval-port designs
  • Will work on Mark IV and Gen V, VI blocks
  • 9/16″-thick decks
  • As-cast intake and exhaust ports
  • No heat risers
  • 1.55″ valve spring seat diameter
  • Heli-coiled 7/16″ screw-in rocker stud holes
  • Designed for use with 3/8″ pushrods
  • Use intake gasket P/N 12366985 and bolt kit P/N 12367959
  • Use head gasket P/N 12363414 for bores to 4.370″ and P/N 12363413 for bores 4.470″ to 4.540″ (Mark IV)
  • Use head gasket P/N 12363412 for bores to 4.370″ and P/N 12363411 for bores 4.470″ to 4.540″ (Gen V, VI)
  • Use head bolt kit P/N 12367779

Note: Rectangular intake ports are larger in volume and designed to enhance high rpm horsepower. They are an ideal street head for those Big-Block enthusiasts who want more power from a street car that sees a lot of drag-strip action.

Brand

Replaces/Supersedes

12363410

Bowtie Rectangular Port Aluminum Bare Cylinder Head for Big-Block Chevy

Chevrolet Performance Bowtie high-performance street cylinder heads are an ideal combination of street drivability and drag-strip performance. They provide a broad power range with ample low-end torque, excellent throttle response, good mid-range torque and enough top-end power to beat your competitors to the finish line. Chevrolet Performance Bowtie street cylinder heads are designed for high-performance applications, with thick deck surfaces and high-velocity airflow passages. The heads are manufactured to precise machining tolerances.

Chevrolet Performance Bowtie street cylinder heads are available in either rectangular or oval intake port configurations. Rectangular intake ports are larger in volume and are designed to enhance high-rpm horsepower. These heads are best for vehicles that see frequent drag-strip action. Cylinder heads with oval intake ports are smaller in volume and are designed for greater low-rpm torque. Oval port heads are best for street applications where lots of bottom end, off-the-line power is desired.

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.