4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

pi swap/headers

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Old 11-20-2009, 01:16 AM
  #1  
N&MRACING
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Default pi swap/headers

Just ordered heads and a kenne bell charger for my GT. I forgot to ask keene bell when giving my app. if the long tube headers that I have will fit with the 99-04 heads. Does anybody know if the headers will fit or do I need to wait another pay check to get headers AGAIN? HAA!! I cant stop MODING
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Old 11-20-2009, 05:05 AM
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stangalator
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I have longs tubes on a pi swapped GT, the headers I got were for the 96-98 npi heads and they fit on the pi heads just fine, they use the same bolt pattern and exhaust port shape. You should be fine.
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Old 11-20-2009, 08:19 AM
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98MustangSTL
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Just for more confirmation.... You will be fine. I had a PI Swapped GT with longtubes.
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Old 11-26-2009, 12:32 AM
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N&MRACING
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Thanks you guy`s. Its been a pain in the pocket book to get this stang going. Now im just waiting for comp cams to get my grind. I wish I could get a loope cam but "Comp" said "Im already pushing my rods with the 10.5.1 compression w/pi-swap", "then topping it off with a wipple." Now im wondering if I should even put on this dam k-bell?
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Old 11-26-2009, 08:09 AM
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Chris98Gt
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Just keep the boost low, I'm running 8psi with PI heads, stage 2 compcams npi cams and It's been together for over 2 years now. Be very conservative with timing if you're tuning it yourself, or be sure to let your tuner know its a pi head swapped car not a whole motor swap.
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