Patriot Performance Ford 4.6 / 5.4L SOHC (PI) Stage III Head Assy W/O Cam.
Stage III SOHC cylinder heads from Patriot Performance are designed to add a 40 to 50 rear wheel horsepower gain over stock PI heads. We begin with OEM Ford castings, then CNC port using our custom designed program, perform our 5 angle valve job, hand blend, then assemble with 1.84" / 1.45" Stainless Valves, Bronze guides, .600" lift springs, and titanium retainers. Ideal for street and strip applications, these CNC-ported heads flow over 225 cfm and can handle blown or nitrous setups. These are perfect addition to your Lightning or 2 valve Mustang. Because of the large intake valve, we do not suggest that they be used on standard bore applications.
Sold as Pair.
When using these on non-PI motors, use PI intake.
*(Sold less rockers and lifters)
Technical Specs:
- Combustion Chamber: 46cc
- Intake Runner: 180cc
- Exhaust Runner: 67cc
- Intake Valve: 1.84"
- Exhaust Valve: 1.453"
- Max. Valve Spring Lift: 0.600"
- Retainer Material: Titanium
- Valve Seal Material: Viton
- Valve Guide Material: Manganese Bronze
- Valve Job: 5-angle
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