It's a Group 48, which is what fits our cars
It should be fully compatible with our tray and battery hold down bracket.
(Group 49 is wider so, for one of those, you just need to move the hold down out to the 3rd screw position.)

Only slight concern I see is the height of the i48CE.
It's significantly lower in height at 5.5" .
I think that still leaves enough down clearance, for the cable terminal blocks.

The i48CX is closer to factory battery height and may be a safer bet, for that downward clearance.
However, I do believe either height will work fine.

 

Thank you again Lunarx I really appreciated your time.

 

Squires, your Trailblazing of 991 mods is an inspiration to us all.
Your 4S is true perfection.