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Not sure about the newer model, but I have an older version that fit and they sound really nice.

Notes:
The wet nature of our doors corroded the Infinity voice coils in my rear doors. They started to rattle and seize up.
I replaced the rear door speakers with Polk marine rated speakers. The infinities sound better, particularly in the bass.
I would recommend getting foam door baffles to keep water away. I have read they they tend to mute the bass response, and many cut a hole in the bottom of them to regain what was lost and keep the shielding the baffles provide.
I posted the cutout size our door adapters have. Can't remember specific size. A search will probably bring it up.

Opinion:
I might aim for a 4+ ohm speaker to essentially make the subs more prevalent. Though you may hit a volume level that you like from the doors, but the subs might be distorting at. So, use some of your own judgement on that.
 

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Discussion Starter · #3 ·
I thought about the 4+ but then the center speaker is too loud I have heard....
 

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Resistor mod.
 

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2009 G8 GT
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I just disconnected that center speaker, reversed the polarity on the rear deck speakers and sounds much better.
 
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