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Old 07-21-2013, 09:26 PM   #1
WJL
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Default Trying to figure out what I got 98 GT

Just bought a 1998 GT the car has some upgrades BBK 70 mm TB, BBK Shorty Headers, SS Exhaust, Eibach Springs, control arms, street and strip NITTO's. anyhow I am trying to figure out if i already have PI heads or if they are stock. Any chance there is an easy way to identify what I got?
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Old 07-21-2013, 09:51 PM   #2
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Just bought a 1998 GT the car has some upgrades BBK 70 mm TB, BBK Shorty Headers, SS Exhaust, Eibach Springs, control arms, street and strip NITTO's. anyhow I am trying to figure out if i already have PI heads or if they are stock. Any chance there is an easy way to identify what I got?
Identifying the heads is difficult without taking either the intake off or the valve cover. You can check if it's a PI intake pretty easily based on how deep it is. Just curious, but what color is that car?
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Old 07-22-2013, 09:33 AM   #3
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What part of PA are you in?
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Old 07-22-2013, 05:56 PM   #4
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I am from Pittsburgh "South Hills", its black I will put better pictures on soon. What do you mean by how deep it is?

I bought the car for $1050.00 had to put a door and fender on it I got less than $1500.00 in it including parts, state inspection and registration. My son and I are just having a blast
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Old 07-22-2013, 07:44 PM   #5
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well I hope you did some research and your not putting $ into those crappy NPI heads that would have come on a 98?
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Old 07-22-2013, 08:31 PM   #6
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I am from Pittsburgh "South Hills", its black I will put better pictures on soon. What do you mean by how deep it is?

I bought the car for $1050.00 had to put a door and fender on it I got less than $1500.00 in it including parts, state inspection and registration. My son and I are just having a blast
NPI is on the left in this picture.

Click the image to open in full size.
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Old 07-23-2013, 10:23 AM   #7
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Look at the picture and determine which intake you have. If its the NPI then you know it still has NPI heads.
However, if it has the PI intake..........Keep searching because a lot of people put PI intakes on NPI heads.

I just put on PI heads and you can't even tell I had it apart...........(and thats how I like to do things....).
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Old 07-23-2013, 04:42 PM   #8
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Thanks, i'm on way way out now to open the hood and check, will let you know later tonight.
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Old 07-23-2013, 06:37 PM   #9
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Yea baby the intake is the deeper of the two, after taking a closer look the motor it has been worked on (you can see the little dabs of gasket sealer on the corners of the valve covers) by the looks of things i'm thinking i got the PI intake and heads. Being the PI heads increase the compression ratio would it be reasonable to expect higher than normal (NPI) PSI if i were to take a compression test?
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Old 07-23-2013, 06:37 PM
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