Dart Pro1 20° Big Block Chevy 440cc Aluminum Heads

Dart Pro1 20° Big Block Chevy 440cc Aluminum Heads

$4240.00

Dart Pro1 fully CNC ported 440cc 20° aluminum racing heads are some of the best out of the box heads produced by Dart. Choose upgrades you may want and your done. Our heads use only Dart valves, Dart Triple .900″ Springs, 10° Locks and Titanium Retainers

 

Components

  • Dart Pro 1 #19705199 20° 440cc Aluminum Heads with 50° Intake
  • Dart Intake 50° and 55° Exhaust Valve Seat Angles
  • 440cc Intake Ports with a 2.4 Valve Flow 466 cfm @ 1.0″ Lift
  • 156cc Exhaust Ports with a 1.8 Valve Flow 332 cfm @ 1.0″ Lift
  • Copper Impregnated Powdered Metal
  • Dart Mag-Bronze ½” OD Fully Machined Valve Guides .530″ Seal
  • Utilizes Existing BBC Intake Manifolds with Spacer End Rail Kit
  • Uses Standard BBC Header Pattern but Raised .600″ Raised
  • Uses Jesel or T&D Shaft Rocker System
  • Stock Hardware Bolts Directly to the Cylinder Heads
  • Increased Deck Thickness to Support Power Adders
  • Uses 1″ Longer Head Bolts Over the Exhaust
  • Machined to 97cc CNC Ported Combustion Chambers
  • Intake, Exhaust and Combustion Chambers are as Cast
  • Dart 2.4 Stainless Steel Intake Valves
  • Dart 1.8 Stainless Steel Exhaust Valves
  • All Valve Seats Hand Lapped to Insure the Perfect Seal and Valve Job
  • Dart Triple Springs for a .900″ Lift Cam
  • Dart +.100 Titanium 10° Retainers
  • Comp Cams 611-16 10° Machined Super Locks
  • U.S. PC Valve Stem Seals Installed (we never leave these off)
  • Dart Hardened Spring Seats or Washers
  • Hot Washed Blown Dry, Lubed and Final Spring Set to Specifications
  • Professionally Assembled, Packaged and Sealed

Available Upgrades

Flat Milling is every .005″ material removed 1cc smaller off the deck surface to get 92cc Combustion Chambers would be .025″ Removed
+ $ 150.00
Manley or Pac Triple Springs
+ $ 195.00
Manley Extreme Duty Enconel Exhaust Valves
+ $ 395.00
Titanium #21472400 Dart Intake Valves and 93cc Combustion Chambers
+ $ 799.00
Titanium #21471800 Dart Exhaust Valves and 93cc Combustion Chambers
+ $ 799.00
Pro Series Dart Specific Fit Head Stud Kit with ½” 12 Point Fasteners for Easy Installation and Clearance Issues
+ $ 295.00
T&D any Ratio Pro Series Shaft Rocker System
+ $1690.00
Jesel any Ratio Pro Series Shaft Rocker System
+ $1890.00
Fel Pro MLS Head Gaskets (up to 4.640 bore size and .041″ thickness, other sizes available)
+ $ 195.00
ARP #235-4188 Specific Fit Pro Series Head Stud Kit with Hex Fasteners and Washers
+ $ 227.00
ProFiler Sniper CNC Match Ported Intake Manifold
+ $ 495.00
Dart 4112400 or 41125000 CNC Match Ported Intake Manifolds for 4500 Series Carburetors
+ $ 695.00
68000040 Dart Cast Aluminum Valve Cover Set with Dart Valve Cover Stud Kit
+ $ 384.00
68000045 Dart Fabricated Aluminum valve Cover Set with Dart valve Cover Stud Kit
+ $ 495.00
Jomar Special CNC Ported 1¼” Spacer, Stud, Gaskets that actually makes up to 5hp and 10lbs of torque
+ $ 120.00

All Completed Heads Come with Specific Build Sheet, all Part numbers, Spring Rates and Installed Height Settings

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