BBC 12° Spread Port Cylinder Heads Race Winning Performance out of the box...
Pro-Stock Port Design promotes high intake port velocity
60cc Combustion Chambers allow lighter pistons, more compression and better combustion
12 Degree Hi-Flow Valve Angle Design
Power... We're Talking Serious Power!
"These Pro-Filer heads have the best flow I've ever seen for the size of the runner. Not only efficient, but also cost effective. Nice casting, no porting required, and major gains. That's why we use them - they work!"...
Mike Faucher, Quest Racing Driver and Engine Builder IHRA Pro Modified
That is what you get with HITMAN BBC Spread Port Cylinder Heads. Designed with a 12 degree intake valve angle, you have a lighter piston and smaller chamber resulting in better combustion.
The HITMAN 12 degree Big Block Chevy Spread Port Head takes the guess out of finding the right port for the best power. Based on our Pro-Stock port technology, our out-of-the-box port design provides better airflow than competitors larger CNC port designs, and that means INSTANT HORSEPOWER!
The HITMAN BBC Spread Port Cylinder Head has what it takes to win: 12 Degree valve angle, Spread Intake Ports, Reliable Hi-RPM Valve Train configuration, efficient intake ports, efficient combustion chamber, high-quality castings and much more.
Notes: 1) Intake Valve: 2.400 2) Exhaust Valve: 1.900 3) Flowed @ 28in of water
Note: Flow rates may vary for any number of circumstances due to valve job, valves, the flow bench used, test parameters, etc.
Technical Details
Material - A356 Primary Ingot Aluminum Valve Angle - 12 Degree Intake Ports - 415 or 470cc Exhaust Valve - 1.80 to 1.90 (1.880" standard) Intake Valve - 2.300" to 2.385" (2.385" standard) Combustion Chamber - 60cc (.005 per cc flat milling, .007 per cc angle milling) Deck Thickness - Approx 3/4" deck for Nitrous and Blown applications Spark Plugs - Use Gasketed 3/4" Reach Plugs Valve Train - Uses T&D or Jessel Shaft Mounted Rocker Systems Bore Spacing - 4.840 (Standard Big Block) Valve Guides - Bronze Valve Seats - Copper Alloy Intake Port Design - Pro-Stock Modified Oval Port Intake Manifold - Use Spread Port Tunnel Ram 187 Series Valve Covers - Pro-Filer PN 190 Rockers - Shaft rockers (T & D, Jesel) Valve Springs - Up to 1.660" Dia
Part Numbers SOLID Heads (No water jackets) are available for $100 extra, call for details...
211 Series BBC 12deg 415cc Spread Port Cylinder Head
PN
Description
Price
211-02-5
Copper Alloy Valve Seats & 5/16 Bronze Guides
$1675.00 ea
211-02-11
Copper Alloy Valve Seats & 11/32 Bronze Guides
$1675.00 ea
211-03-5
Valve Job with 5/16 Bronze Guides
$2075.00 ea
211-03-11
Valve Job with 11/32 Bronze Guides
$2075.00 ea
211-04-5
Assembled with 5/16 Bronze Guides, 3 angle valve job, Copper Alloy Seats, Victory Titanium Valves (2.300/1.880), TI Retainers, Double Roller Springs, 10 Degree Locks
$3499.00 ea
211-04-11
Assembled with 11/32 Bronze Guides, 3 angle valve job, Steel Seats, Victory Titanium Valves (2.300/1.880), TI Retainers, Double Roller Springs, 10 Degree Locks
$3499.00 ea
184 Series BBC 12deg 470cc Spread Port Cylinder Head
BBC 12° Spread Port Cylinder Heads
That is what you get with HITMAN BBC Spread Port Cylinder Heads. Designed with a 12 degree intake valve angle, you have a lighter piston and smaller chamber resulting in better combustion. 
