Hey Yinz, looking to replace my battery. Currently have a group 24. Will a 27 or even a 31 fit. I have a 2105 320 CSS standard tongue box. Thanks in advance for comments.
A group 27 box will fit in the standard tub, but it has to sit at an angle and will require extending the platform a bit. There's more information here.
The box I installed is a little bigger than my group 27 battery. Preliminary measurements suggest it may accommodate some group 31s, but I haven't physically tried that yet.
I have a group 31 Firefly carbon foam battery, put into an angled Grp 27 box , literally, wedged into my tub. I had to trim the top lid corner off some so it would have enough clearance to open and close. So, yes, it can be done. More power!
Comments
2015 Subaru Outback 3.6r (unsafe 200lb tongue weight limit until 2020 models)
2020 Subaru Outback XT
Pacific NW