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Old 03-14-2018, 03:56 PM
1977GPX's Avatar
1977GPX 1977GPX is offline
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Location: Midwest
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Default 77 400 Pontiac Grand Prix Headers

Hello All,

Can anyone give me some information on what Make/Model headers work best for my 400. Cylinder heads are D port Aluminum 72cc heads. Appreciate any advice.

Thanks,

Gregg

  #2  
Old 08-27-2020, 06:12 AM
Karck's Avatar
Karck Karck is offline
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Location: Finland, Near Ruskies.
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Did you ever solve this?

I have currently stock log type manifolds but driver side studs are in bad condition and im not sure if RARE / Ram air manifolds fit the GP because of the frame brace diagonal is already really bitch to avoid while trying fabricate downpipe for the current log...

  #3  
Old 09-11-2020, 08:39 PM
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gtokid1968 gtokid1968 is offline
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We put ceramic coated Ram air manifolds on it they worked great.
The head pipes hang a little lower than he would like but they haven't hit the ground as of yet.

  #4  
Old 09-11-2020, 08:43 PM
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gtokid1968 gtokid1968 is offline
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If I remember correctly we just left the lower braces off.
And modified the trans cross over so the pipes would go straight back

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