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Lifetime Member
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3,269 Posts
Hi, welcome to the G6club.
I think you would be able to tell the difference. As far as your question about how much, well 20HP more:p
 

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Registered
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77 Posts
Yep. My old 2005 G6 GT had the 200hp LX9 and my current car a 2007 G6 GT has the 224hp LZ4 and you can feel it.

Mark.
 

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Break My Wallet Tech
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77 Posts
I have got a 07 GTP Sedan, and I am going to get it tuned after I put the GT-R exhaust on it and CAI.
My gain should be 20-50Hp, depending on Octane level...
 
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