C Style Big Block Ford Canted Valve Cylinder Heads
Series P/N: 221-03-11
- Accepts up to 1.650 O.D. Springs
- Bronze valve guides reduce stem wear
- 420cc Oval Pro Stock Intake Port
- Made in the U.S.A.
Pro-Filer has taken Big Block Fords to a new, power-producing, high. The Pro-Filer C Canted Valve cylinder head features an amazing Pro Stock style intake port that is an oval design and flows over 520 cfm! And since we know you love high RPM, the 'C' replacement has a rigid rocker stand area to provide better stability.
So whether you are at the strip or hooked to a sled your Blue Oval will be putting those ole' bowties on the trailer.
When looking for an intake manifold we suggest using a custom sheet metal intake or a Ford Motorsports Intake.
Details
Series P/N: 205 C Style Big Block Ford Head Specifications
| Material: | Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot) |
| Valve Angle: | Canted Valve |
| Bore Spacing: | 4.900 (standard big block) |
| Intake Port Volume & Shape: | Oval-Shaped, PRECISION As-Cast 420cc |
| Intake Port Location: | |
| Intake Port Flow: | |
| Combustion Chamber: | Heart-Shaped As-Cast - 54cc |
| Milling: | .005 per cc flat milling, .007 per cc angle milling |
| Exhaust Port Location: | Raised .200" from stock location |
| Valve Diameter: | Intake - 2.450", Exhaust - 1.850" |
| Valve Length: | Intake - 6.700" long (2.100 install) , Exhaust - 6.700" long (2.100 Install) |
| Deck Thickness: | 1/2" Deck for Nitrous or Blown Applications |
| Spark Plugs: | Revised location to improve flame travel. Use .750" Reach, Gasketed (NGK R5671A-7 or colder) |
| Rocker System: | Jesel P/N KPS-458197 or T&D |
| Valve Guides: | Manganese Bronze to assist in extending valve life |
| Valve Spring Pocket: | |
| Valve Seats: | Copper Alloy (standard) |
| Engine Size: | 4.60 bore size and larger |
| Application: | High Performance (i.e. street/strip/marine) |
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