360 Interstate battery # MTX-48/H6 direct fit--WRONG!

I just replaced my interstate MT5-48/H6-FR which was in my car.
I installed an Odyssey Performance series 48-720 which as exactly the same size.
It is a tight squeeze as was the Interstate, you just have to make sure cables are tucked out of the way in order to be able to slide it further in.

 

+1

I felt this way 3 years ago when I installed a new battery. After changing the connectors and putting everything back together
I cut a rectangle piece out of a dense rubbery truck mud flap and placed it between the battery and those metal bits.
That gave me the confidence that I needed to trust the setup.

 

Get an MTZ-34R, that should be correct.

 

FYI. Posted on an older thread. This is what I just installed (replacing the exact same one that was there for the last 5y with no issues):
From Autozone ($159.99+tx) : Duralast Gold Battery H6-DLG Group Size 48 730 CCA

 

https://www.interstatebatteries.com/products/mtz-34r

 

Hehe, Autozone has a 3y free replacement battery on their Duralast Gold (wet) & Platinum (AGM) series too ;-)

Which BTW, I went with the "wet" design. It's cheaper and no disadvantage when maintained on a trickle charger. I'm sure some will argue it's not a good idea to go cheaper on a Ferrari but in my experience wet batteries last longer than AGM.

 

I only prefer AGM because you never have to add water, and checking electrolyte level on a Ferrari is always a pain, due to the awkward place the put batteries on these cars. Also, an AGM will typically (though not always) last a couple years longer than a wet cell battery.

 

AGMs don’t leak. Best reason.


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Don't be too confident of AGM batteries not leaking.
This is the Interstate MT5-48/H6-FR that was in my 360. It was purchased by the previous owner from the Ferrari dealership that also installed it in April 2016.
There is the leak at the front pictured here, and after removing it there was also a sign of it leaking at the back corner. Fortunately there was only some slight discoloration to the plating on the battery tray.
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Optima red tops AGMs do...unfortunately.
Several of us have experienced this

 

Ok, well, AGMs are less likely to leak than standard wet cells.


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My battery is still working fine but getting a bit old. So I looked at older threads and most mention the MT-91 size (6.8 in. tall) as the direct fit replacement for 360s and 430s, but it's a flooded cell. The MTZ-48/H6 size is a bit taller (7.5 in. tall), which explains why people run into fitment issues. Unlike the MT-91, however, the MTZ-48/H6 is AGM. I could not find an AGM in the MT-91 size (from Interstate, anyway). Interstate now says to use a MTZ-48/H6, and on most cars that would work. But most cars don't squeeze the battery under the passenger footrest.
I also looked at Antigravity, and they have and spec the MT-91/T6 size for the 360. They also have and spec an H6 for 458s, which also puts the battery in the passenger footwell, but I'm guessing has more room.