I'm currently rebuilding my 3100 in my 96 GP and putting some new performance parts into it and replacing the gaskets.
I am going to swap over to a 3400 topend gasket matched porting, Pistons, and Rod bearings. Deleted the cat right before the car broke.
Anyway I think I remember reading that if ya swap over to a different piston that came in an older a 3.1v6 (RWD I think?)that it will raise compression. Also remember reading that there was exhaust manifolds that come on different 60*v6 that flowed much better then stock. Any one have more info on these?
The tear down.
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0383.jpg)
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0386.jpg)
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0391.jpg)
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0390.jpg)
Old Rear head
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0388.jpg)
Old Front head
Thanks,
Andrew B.
I am going to swap over to a 3400 topend gasket matched porting, Pistons, and Rod bearings. Deleted the cat right before the car broke.
Anyway I think I remember reading that if ya swap over to a different piston that came in an older a 3.1v6 (RWD I think?)that it will raise compression. Also remember reading that there was exhaust manifolds that come on different 60*v6 that flowed much better then stock. Any one have more info on these?
The tear down.
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0383.jpg)
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0386.jpg)
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0391.jpg)
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0390.jpg)
Old Rear head
![](http://i195.photobucket.com/albums/z206/andydarko31/1996%20Pontiac%20Grand%20Prix%20SE/IMAG0388.jpg)
Old Front head
Thanks,
Andrew B.
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