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Part number: 19474030M
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Product Details
Dart 19474030M Pro 1 BBC Head
Products specifications
Comb Chamber 121cc
Intake Runners 355cc
Valves 2.300 Int / 1.880 Exh
Pro 1 BBC Marine 335 Cylinder Head
Bare Casting

Every intake port, every exhaust port, every valve bowl and every combustion chamber is 100% CNC machined on special, dedicated Pro 1 castings. Our 5-axis computer controlled machining centers produce compound curves and complex shapes that no human could duplicate with a hand grinder.

Features:

  • Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.
  • Bolt on compatibility: 2 degree rolled valve angle and standard spacing accommodates all stock accessories.
  • Heart shaped 121cc chambers improve combustion efficiency.
  • CNC machining ensures that every chamber has the same volume so that every cylinder maintains equal compression.
  • Raised spark plug location improves flame travel for a quicker, more complete burn, producing more power.
  • Multi-angle intake seats and radiused exhaust seats greatly improve air flow.
  • Hardened exhaust seats are compatible with unleaded gasoline.
  • Exhaust ports raised .300 to improve flow (requires 1 longer head bolts next to exhaust ports).
  • Spark plug holes are machined for gasketed 3/4 reach plugs.
  • Manganese bronze valve guides ensure long term reliability.
  • All cylinder heads sold individually.
Reviews
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M
Best prices I could find anywhere! Fast shipping. Will definitley buy from again.
J
No hotchkis rear 2" lowering springs available
8
Hard to find part, in stock, and the best price around.  Amazing!!!
J
Product delivered as expected within 4 days.  Lowest price on the web.  No complaints.
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