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Old 11-23-2009, 03:21 PM   #1
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valves

Does anyone know the diameter of the stock intake and exhaust valves for a 99-04 mustang gt with pi heads?
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Old 11-23-2009, 03:21 PM   #2
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Re: valves

In inches.
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Old 11-23-2009, 10:46 PM   #3
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Re: valves

I hit up some of my contacts to try and find out.
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Old 11-24-2009, 12:39 PM   #4
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Re: valves

1999-2002 PI Heads
Combustion Chamber: 44cc
Intake Valve: 43.69mm (1.752)
Exhaust Valve: 36mm (1.417)

*Stock Intake Flow @ 0.50 Lift: 165 CFM
*Stock Exhaust Flow @ 0.50 Lift: 150 CFM

(*Noted as 1999-2004 PI Heads).
Source: http://www.sullivanperformance.com/yvs450/tech/tech.htm
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