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Back / Cylinder Heads / Dart Cylinder Heads / Dart Pro-1 Big Block Chevy CNC Head
Description:

Pro 1 CNC Big Block Chevy Cylinder Heads

Dart Pro 1 CNC heads are professional quality competition cylinder heads. We applied the air flow technology developed in our championship winning Pro Stock engine program to produce these state of the art heads.

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.

Call for availablity and pricing! Assembled heads packages also available!


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KPK - 19474030A8 BBC 335CCCNC PORTED PRO-1 COMPLT    $3,299.99
KPK - 19574030A8 BBC 355CCCNC PORTED PRO-1 COMPLT    $3,299.99
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