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Dart Aluminum Pro 1 Small Block Chevy Head, 72cc, Angle Plug

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Dart Aluminum Pro 1 Small Block Chevy Head, 72cc, Angle Plug
Dart Aluminum Pro 1 Small Block Chevy Head, 72cc, Angle Plug
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Dart Aluminum Pro 1 Small Block Chevy Head, 72cc, Angle Plug

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Please note the following about this product:

  • This product is discontinued.

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What's in the Box

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Dart's highly popular small-block Pro1 heads are loaded with features, which is why they are among the best 23° aluminum heads on the market. Highly efficient chambers feature excellent fuel distribution while the five-angle intake seats shear the liquid fuel and air as it enters the chamber. Spark plugs are located high and and as close to the center of the chamber as possible for a complete burn.

The 180cc and 75cc ports feed 2.02" intake and 1.60" exhaust valves using 1.25" diameter springs that can handle up to .520" lift. For gaskets use Felpro 1205 (Speedway 344-1205) on the intake and 1404 (Speedway 344-1404) on the exhaust. A good starting point for plugs is a AR3934 Autolite.

  • Flows a streetable 257 cfm intake/172 cfm exhaust @ .500" lift
  • Best suited for engines making 400-500 horsepower
  • Cast from 355T6 aluminum alloy
  • Stainless Steel valves
  • Five-angle hardened valve seats 
  • Accepts standard intake and exhaust manifolds or headers
  • 1.25" Comp Single Valve Springs w/ 7° steel retainers (.520" max lift)
  • Includes rocker studs & guide plates
  • Ready to install

304-1121 Instructions (PDF)

Specs

  • 72 cc combustion chamber
  • 2.02" intake, 1.60" exhaust valves
  • 180cc intake volume
  • 75 cc exhaust volume
  • Intake dimensions: 1.190”w x 2.075”h
  • Exhaust dimensions: 1.410”w x 1.350”h
  • Intake flow: 257 cfm @ .500” lift / 28”
  • Exhaust flow: 172 cfm @ .500” lift / 28”
  • Use .750” reach gasketed spark plug
  • Weight: 23 lbs bare

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