Pro-Filer All American 13 Degree SBC Cylinder Heads

The New All American RS 13deg 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.
Available with an as cast 285cc intake port or fully CNC ported to 300cc. 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.
All American 13 Degree SBC Racing Cylinder Heads
Material: Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot)
Valve Angle: 13 Degree
Intake Port Volume and Shape: 285cc, PRECISION As-Cast
Combustion Chamber: Heart-Shaped, As-Cast 42cc
Valve Spring Pocket: Maximum of 1.675 (no deeper) Exhaust Valve: 1.600"
Intake Valve: 2.180"-2.200"
Deck Thickness: 1/2" deck
Spark Plugs: Uses Gasketed 3/4" Reach Plugs such as NGK R5671-7 Series
Valve Seats: Steel or Copper Alloy
Valve Guides: Manganese Bronze to assist in extending valve life
Milling: .0050 per cc flat milling
Engine Size Recommendation:357cid & larger
Application: High Performance Drag Racing / Circle Track