All American Race Series
CNC Machined 13°
SBC Cylinder Heads
P/N: 219-X-C30-03-511
- 13 Degree Modified Valve Angle
- 235cc Rectangular CNC Ported Intake Port
- 63cc Heart Shaped CNC Machined Chambers
- 2.125" Intake & 1.600" Exhaust Valves
- Accepts up to 1.675 O.D. Springs
- Made in the USA
The New All American Race Series 13° CNC port cylinder head features the most reliable casting in the industry. Made from Pro-Filer's unique A356 alloy and featuring an unmatched port and chamber design, this head has what it takes to get you to the front of the pack.
Fully CNC machined 300cc Intake Ports for High Flow rates and designed with a solid rocker bar, an efficient combustion chamber and well over 400cfm it is easy to see why this is an "All American" choice for you SBC racing application.
Details
Series P/N: 219X CNC Machined SBC Head Specifications
| Material: | Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot) |
| Valve Angle: | 13 Degree |
| Intake Port Volume | 235cc CNC Ported Rectangular Port |
| Exhaust Port | Round CNC Ported, Standard Location |
| Combustion Chamber: | 63cc Heart Shaped CNC Machined Chamber |
| Spring Pocket: | Maximum of 1.675 (no deeper) |
| Valves: | 5.740" Long Intake 2.125" Dia with 11/32 Stem, 5.740" Long Exhaust 1.600" 11/32 Stem |
| Deck Thickness: | 1/2" |
| Spark Plugs: | .750 Reach, Gasketed (NGK R5671A-7 or colder) |
| Valve Seats: | 45° Ductile Iron |
| Valve Guides: | Manganese Bronze to assist in extending valve life |
| Rocker System: | Shaft Jesel or T&D |
| Milling: | Flat - .0050" per cc |
| Engine Size: | 357cid & larger |
| Valve Covers: | Std SBC rail bolt |
| Bore Spacing: | Standard |
| Application: | Street, Strip, Circle Track, Marine |
Air Flow Detail #219X SBC CNC All American Head - 300cc Runner
Pro Filer Small Block Chevy CNC All American Heads with 300cc Intake Runner, 2.200" Intake Valve and 1.600" exhaust valve. Flow data based on Cylinder #1 intake and exhaust port. Flow measured at 28" of depression.
Air Flow Detail #219X CNC 300cc Runner
| Lift | Intake CFM | Exh CFM | % Exh/Int |
|---|---|---|---|
| 0.200 | 182 | 127 | 70% |
| 0.300 | 248 | 169 | 68% |
| 0.400 | 314 | 205 | 65% |
| 0.500 | 367 | 240 | 65% |
| 0.600 | 390 | 261 | 67% |
| 0.700 | 402 | 275 | 68% |
| 0.800 | 405 | 286 | 71% |
Air Flow Chart #219X - 300cc Runner
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