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Dart Pro 1 Fully CNC Ported 227cc SBC Cylinder 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!
- Aluminum Alloy
- Darts New Rolled Radius Valve Job
- Ductile Iron Valve Seats
- Bronze Alloy Valve Guides
- Increased Deck Thickness
- 66cc Chambers
- Utilizes Existing 23 Degree SBC Intake Manifolds
- Fits Standard Chevrolet Style Blocks
- ExhAust Fits Standard SBC Header Pattern
- Does not require the use of a shaft style rocker systems but is a great advantage
Features:
- 2.080″ Manley 11/32 Stainless Intake Valves
- 1.600″ Manley 11/32 Stainless Exhaust Valves
- 1.550″ Double Roller Valve Springs (.700 Lift)
- 10 Degree Titanium Retainers
- Comp Cams 10° Machined 611-16 Locks
- US Seals P/C Style Valve Guide Seals
- Hardened Spring Cups
Assembly Package Includes:
Upgrades and Options
Manley Titanium Intake Valves
+ $795.00
Manley Titanium Exhaust Valves
+ $795.00
Manley Inconel Exhaust Valves
+ $325.00
Copper Alloy Seats
+ $400.00
T&D Pro Series Shaft Rocker System
+ $995.00
Roller Tip Bearing Option
+ $200.00
Jesel Pro Series Rocker Shaft System
+ $1275.00
Cometic or Fel Pro MLS Head Gaskets
+ $180.00
ARP Head Stud Kit
+ $150.00