In the bose systems i have seen 4" all around and i have seen 4" up front and 6.5" in the rear. Like someone said above, it varied by model. Companies are out there that offer adapter plates to convert to 6.5" all around. Sometimes Nissan even has them in stock.
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Originally Posted by
satanshatch
"If it's got tits or wheels you're always going to have problems with it" - My father
