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Dart Pro 1 Fully CNC Ported 227cc SBC Heads
Dart PRO 1 CNC heads are professional quality competition cylinder heads. They applied their airflow technology developed in their championship winning Pro Stock engine program to produce these state-of-the-art heads. Every intake port, every exhaust runner, every valve bowl, and every combustion chamber is 100% CNC machined on special dedicated PRO1 castings. Their five-axis computer-controlled machining centers produce compound curves and complex shapes that would take days to hand duplicate even if it could be done
- 355 T61 Virgin Aluminum Alloy
- Dart 4 Angle Int-Valve Seat w/Rolled Radius Exhaust
- CNC Wet Flow Ports & Combustion Chambers
- Intake Ports Flow 309cfm @ .700″ Lift
- Exhaust Ports Flow 226cfm @ .700″ Lift
- Increased Deck Thickness
- Accessory Bolt Holes In Stock Location
- Ductile Iron Valve Seats
- Bronze Alloy Valve Guides
- Fits Standard Chevrolet Style Blocks
- Utilizes Existing SBC Intake Manifolds
- Uses Standard SBC Header Pattern
- Uses Standard SBC Rocker Arms
- 66cc CNC’d Combustion Chambers
- 2.080″ Manley Stainless Steel Intake Valves
- Seats Diked and Hand Lapped to Insure Perfect Seal
- 1.600″ Manley Stainless Steel Exhaust Valves
- Seats Diked and Hand Lapped to Insure Perfect Seal
- Manley Nex Tek 1.550″ Double Roller Springs (.700″ Lift)
- Manley 10° Titanium Retainers
- Manley 10° Machined Locks
- U.S. P/C Valve Stem Seals
- Dart Special Hardened Spring Cups
- Screw In Studs & Guide Plates Supplied
- Hot Washed Blown Dry & Clean
- Professionally Assembled, Packaged & Shipped
Upgrades & Options
60-64cc Combustion Chambers
+ $100.00
Upgrade to 2.100″ Intake & Rolled Radius Valve Job (up to 10hp gain)
+ $295.00
Manley Titanium Intake Valves
+ $795.00
Manley Titanium Exhaust Valves
+ $795.00
Manley Inconel Extreme Duty Exhaust Valves
+ $325.00
Manley Comp Eliminator Valve Springs (Intake Only)
+ $125.00
Manley Comp Eliminator (Intake & Exhaust)
+ $245.00
2 Piece Adjustable Guide Plates
+ $75.00
Arp Head Bolt Kit
+ $75.00
ARP Head Stud Kit
+ $175.00
Hand Tootsie Roll Intake, Exhaust and Combustion Chambers
+ $295.00
Full Awesome Engines Ported 230cc Version w/2.10 Intake Valves
+ $895.00
Jesel Shaft Rocker System
+ $995.00
T&D Shaft Rocker System w/Roller Tip Pro Series Rockers
+ $1095.00
Jomar Pro Series Stud Girdle
+ $245.00
Cometic MLS Head Gaskets (up to 4.165 bore size and .051″ thickness, other sizes available)
+ $185.00
Dart Race Intake Just Bolt On!
+ $375.00
Jomar Special CNC Ported 3D 1¼” Spacer, Actually makes up to 5hp and 10lbs torque
+ $75.00
Dart CNC Match Ported 4500 Intake Manifold
+ $595.00