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Dart 19300030 Pro 1 BBC 345cc Aluminum Cylinder Head Bare Casting

Manufacturer

Picture for manufacturer Dart

Part Number

19300030
7 reviews
Sale Price

$1,604.59

3 left at this price

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Usually delivered within 2 days

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Product Details

The Dart Pro 1 BBC 345 cylinder head delivers precision-engineered performance for Big Block Chevy engines through 100% CNC machining on dedicated castings. Every intake port, exhaust port, valve bowl, and combustion chamber is shaped by 5-axis computer controlled machining centers that produce compound curves and complex geometries impossible to replicate by hand.

Key Features:

  • Cast from virgin 355-T61 aerospace aluminum alloy for superior strength and durability
  • Heart-shaped 121cc combustion chambers optimize burn efficiency and power output
  • 2-degree rolled valve angle with standard spacing for bolt-on compatibility with stock accessories
  • CNC machined chambers ensure identical volume across all cylinders for consistent compression ratios
  • Raised spark plug location improves flame propagation for faster, more complete combustion
  • Multi-angle intake valve seats and radiused exhaust seats maximize airflow potential
  • Hardened exhaust valve seats compatible with modern unleaded gasoline
  • Exhaust ports raised 0.300" for improved flow characteristics (requires longer head bolts adjacent to exhaust ports)
  • Manganese bronze valve guides provide long-term wear resistance
  • Spark plug holes machined for gasketed 3/4" reach plugs

Sold as individual bare casting (valvetrain components not included). This head is designed for serious performance builds requiring precise port work and optimal flow dynamics straight from the factory.

Products specifications

Accessory Bolt Holes Drilled

Yes

Calculator

Compression Calculator

CNC-Machined Combustion Chamber

No

CNC-Machined Exhaust Runner

No

CNC-Machined Intake Runner

No

Comb Chamber

121cc

Combustion Chamber Style

Heart

Combustion Chamber Volume (cc)

119

Cylinder Head Finish

Natural

Cylinder Head Material

Aluminum

Cylinder Head Style

Bare

Damper Spring Included

No

Exhaust Port Location

Raised

Exhaust Port Shape

Round

Exhaust Runner Volume (cc)

129cc

Exhaust Valve Angle

15

Exhaust Valve Diameter (in)

1.880 in.

Exhaust Valves Included

No

Guideplates Included

No

Heat Crossover

No

Intake Port Location

Standard

Intake Port Shape

Rectangular

Intake Runner Volume (cc)

345cc

Intake Runners

345cc

Intake Valve Angle

24

Intake Valve Diameter (in)

2.300 in.

Intake Valves Included

No

Machined for O-Ring

No

Notes

Exhaust flange will accept stock-type gasket.

Oiling Style

Through pushrod

Quantity

Sold individually.

Rocker Arm Nuts Included

No

Rocker Arm Studs Included

No

Rocker Arms Included

No

Steam Holes Drilled

No

Valve Cover Mounting Style

Perimeter bolt

Valve Guide Material

Manganese bronze

Valve Seat Machine Style

4-angle intake/3-angle exhaust

Valve Seat Material

Ductile iron

Valve Seats Machined

Yes

Valve Springs Included

No

Valves

2.190 Int / 1.880 Exh

Intake Valve Diameter

2.300

Make

Chevrolet

CNC Ported

Yes

Exhaust Valve Diameter

1.880

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Valve Angle

24

Industry

Automotive

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Good products with low prices. Easy website and pament options.

Easy ordering

Exact product as promised with the best price on the internet. Product shipped fast and had a tracking number to keep me up to date on my order. I would order from again without hesitation and will tell friends.

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