I would wait to pull them out to see what fits. The width is not the only critical dimension, the depth can be also. The impedance should be matched as well.
__________________
2014 Crossroads 270BH towed by a 2008 Sequoia and filled with family, friends, and great memories.
mine are 5.5 and have a small shallow magnet. i have some 6.5 that I'm putting in BUT need spacers to allow for the much larger and deeper magnets. I'm adding a 50x4 amp with a sub out channel that's 100x1 for my subwoofer, I'll see how well the outside speakers handle the extra power before replacing them. Inside is Polk Audio with a Jl sub box and I may replace the outside with Rockford marine speakers.