Biggest battery? 06 4.0

[6.2]

Just wondering what "group" or size battery I can fit in the stock location.

The more CCA the better but I don't want to have to modify the battery tray.

Current battery is to old to see the info on the label.

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[shane96ranger]

I believe a group 65 is about as big as you can go. I have a group 65 in my Mustang I bought at Costco and it has 850 CCA. It also has a 3 year no questions asked free replacement warranty.

 

[6.2]

Stock is 59 right?

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