Dart® - Pro 1 Bare Cylinder Head

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  • This product is NOT legal for installation on vehicles required to meet CARB standards and/or registered in California and other states following CARB standards, including NY and ME.
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Product Details

Pro 1 Bare Cylinder Head (11320010P) by Dart®. 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.This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a hassle free installation, this reliable product can help you get your vehicle back on the road faster and easier.

Notes: This product is NOT legal for installation on vehicles required to meet CARB standards and/or registered in California and other states following CARB standards, including NY and ME.



Accessory Bolt Holes Drilled: Yes
Calculator: Compression Calculator
CNC-Machined Combustion Chamber: No
CNC-Machined Exhaust Runner: No
CNC-Machined Intake Runner: No
Combustion Chamber Size: 64 cc
Combustion Chamber Style: Heart
Combustion Chamber Volume: 64 cc
Cylinder Head Finish: Natural
Cylinder Head Material: Aluminum
Cylinder Head Style: Bare
Exhaust Port Location: Standard
Exhaust Port Shape: Square
Exhaust Runner Volume: 75cc
Exhaust Valve Angle: 23
Exhaust Valve Diameter: 1.600"
Heat Crossover: No
Intake Port Location: Standard
Intake Runner Volume: 200cc
Intake Valve Angle: 23
Intake Valve Diameter: 2.020"
Machined for O-Ring: No
Oiling Style: Through pushrod
Outside Diameter of Outer Spring: Bare
Quantity: 1 Piece
Series: Pro 1
Spark Plug Style: Straight
Steam Holes Drilled: No
Valve Cover Mounting Style: Center and perimeter bolt
Valve Guide Material: Manganese bronze
Valve Seat Machine Style: 4-angle intake/3-angle exhaust
Valve Seat Material: Ductile iron
Valve Seats Machined: Yes
Weight: 27 lbs


  • Premium alloy: Dart aluminum heads are cast from virgin C355-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 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
  • Dual exhaust bolt pattern spot is provided for easy header fitment
  • All cylinder heads sold individually


  • Intake Valves: No
  • Exhaust Valves: No
  • Valve Springs: No
  • Damper Spring: No
  • Retainers: No
  • Locks: No
  • Valve Stem Seals: No
  • Rocker Arms: No
  • Rocker Arm Studs: No
  • Rocker Arm Nuts: No
  • Guideplates: No
  • Valve Guides: Yes

Looking for quality performance engine parts, so you can blow away the competition? Rely on Dart®, the company that’s been leading the way in racing engine components for more than 30 years. Founded by Richard Maksin in 1981 in a two-car garage in Oak Park, Michigan, Dart has grown to become a leading manufacturer of aftermarket cylinder heads, intake manifolds and engine blocks. The company’s commitment to creating the industry’s best engine parts makes it the perfect choice for racers and performance enthusiasts. Dart does all research, development, machining and assembly in its own facilities in Troy, Melvindale and Warren, Michigan to give you the best in quality with any product you buy. Engineered with state-of-the-art CNC equipment and thoroughly inspected, nothing can beat Dart’s products in performance and durability. Stay on the winning track with championship-winning Dart engine components!

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Dart Machinery Ltd. (from here on referred to as Dart) warrants to the original purchaser that the products will be free from defects in material and workmanship under normal use. Dart’s obligation under this warranty shall be limited to the repair or replacement, at its’ option, of any parts or products which may prove defective under normal use within six (6) months from the date of sale, and which the examination of Dart reveals to its’ satisfaction that the products in question are in fact defective. This warranty is expressly in lieu of all other warranties expressed or implied including the warranties of merchantability and fitness for use and of all other obligations or liabilities on the part of Dart. The purchaser acknowledges that he is not relying on Dart’s skill or judgment to select or furnish goods suitable for any particular purpose and that are no warranties, which extend beyond the description on the face hereof. The warranty contained herein shall not apply to any part or product, which has been subject to accident, negligence, alteration, abuse or misuse. Dart makes no warranty whatsoever in respect to accessories or parts not supplied by Dart Machinery Ltd. This warranty shall apply only within the boundaries of the continental United States. Any affirmation of fact or promise made by Dart shall not be deemed to create an express warranty that the product shall conform to the affirmation or promise; any description of the product is for the sole purpose of identifying it and shall not be deemed to create an express warranty that the product shall conform to such description; any sample or model is for illustrative purposes only and shall not be deemed to create an express warranty that the product shall conform to the sample or model; and no affirmation or promise, or description, or sample or model shall be deemed part of the basis of the bargain.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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Low Prices Price match guarantee
Guaranteed Fitment Always the correct part
In-House Experts We know our products
Easy Returns Quick & Hassle Free

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