No hassle
returns
Live in-stock
inventory
Save over
60% retail
You have no items in your shopping cart.
July Sale: $1,422.58
In Stock (3)
Usually delivered within 2 days
Free Shipping
Part number: 11971143P
Competitor Pricing
Product Details
Dart 11971143P Cylinder Heads
Products specifications
Accessory Bolt Holes Drilled Yes
Calculator Compression Calculator
CNC-Machined Combustion Chamber Yes
CNC-Machined Exhaust Runner Yes
CNC-Machined Intake Runner Yes
Comb Chamber 66cc
Combustion Chamber Style Heart
Combustion Chamber Volume (cc) 64
Cylinder Head Finish Natural
Cylinder Head Material Aluminum
Cylinder Head Style Assembled
Damper Spring Included Yes
Exhaust Port Location Standard
Exhaust Port Shape Square
Exhaust Runner Volume (cc) 85cc
Exhaust Valve Angle 15
Exhaust Valve Diameter (in) 1.600 in.
Exhaust Valves Included Yes
Guideplate Pushrod Size 5/16 in.
Guideplates Included Yes
Heat Crossover No
Intake Port Location Standard
Intake Runner Volume (cc) 227cc
Intake Runners 227cc
Intake Valve Angle 24
Intake Valve Diameter (in) 2.080 in.
Intake Valves Included Yes
Lock Style 10 degree
Locks Included Yes
Machined for O-Ring No
Maximum Valve Lift (in) 0.690 in.
Number of Springs Per Valve Dual
Oiling Style Through pushrod
Outside Diameter of Outer Spring (in) 1.550 in.
Quantity Sold individually.
Retainer Material Titanium
Retainers Included Yes
Rocker Arm Nut Thread Size 7/16-20 in.
Rocker Arm Nuts Included No
Rocker Arm Studs Included Yes
Rocker Arms Included No
Spark Plug Style Angle
Steam Holes Drilled No
Valve Cover Mounting Style Center and perimeter bolt
Valve Guide Material Manganese bronze
Valve Guides Included Yes
Valve Seat Machine Style 4-angle intake/3-angle exhaust
Valve Seat Material Ductile iron
Valve Seats Machined Yes
Valve Springs Included Yes
Valve Stem Seal Style PC seal
Valve Stem Seals Included Yes
Valves 2.08 Int / 1.60 Exh
Pro 1 CNC SBC 227 Cylinder Head

The redesigned chamber features improved fuel distribution , spark plugs are located high and as close to the center of the chamber as possible and five angle intake seats shear the liquid fuel and air as it enters the chamber. The intake face, exhaust face and exhaust ports have been redesigned, valve guide bosses are profiled and casting walls are cleaner and more consistent, resulting in greater control over flow, heat and combustion. Multiple intake sizes are available to suit engines from mild street to big-inch full competition.

Features:

  • Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.
  • Bolt on compatibility: Standard valve angle and spacing are retained to allow use of off the shelf pistons and valve train components.
  • Heart shaped chambers improve combustion efficiency and fit most standard pistons.
  • Multi-angle intake seats and radiused exhaust seats dramatically increase airflow.
  • Hardened exhaust seats are compatible with unleaded gasoline.
  • Manganese bronze intake valve guides and phosphorous bronze exhaust valve guides extend cylinder head life.
  • Choice of angled or straight spark plugs to clear manifolds and headers.
  • Spark plug holes are machined for gasketed 3/4 reach plugs.
  • 5-axis CNC bowl blended for optimal flow characteristics.
  • Dual exhaust bolt pattern spot is provided for easy header fitment.
  • All cylinder heads sold individually.
Reviews
Add your review
C
Such a smooth shopping process. Prices are super competitive, thanks autoplicity! :)
E
Great service. fast shiping!
P
Your website is very easy to use and I love the fact that I could pay through Amazon.
J
I bought this item for my fiance and he loves it! He was completely happy with the price we paid...
Show All Reviews
Return Policy
Returns are easy at THMotorsports
Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy