I want to get an optima yellow top but according to optima and everywhere I looked there isnt one compatible with our cars. So what size are you guys running?

51r looks like it would be the right one but just wanted to check.

 

The Yellow top Optima only comes in one size and its fits. I went to Pep Boys to get one and they told me that it wasn't made for my car. I purchased it anyway and tossed it in for a perfect fit. Get it, it's a great battery.

 

what?? one size?? iirc..25 fits, but i don't remember. do a search

 

That's what I was told that the battery only comes in one size. Get it and put it in your car and be done with it. If it doesn't fit, return it. It will ift!

 

i'm running 34R here...

my stock 5th gen positive terminal had to be modified in order to make it fit tho

 

they DONT come in one size

 

My bad, I was wrong on the sizing. There are several sizes for the Yellop Top. The one that I have in my 2kse is the D34/78. I got it for $149.00.

Optima Yellow Top Spec Sheet

 

The Correct size for the maxima is the D34A, however a D31A will fit for those running huge systems. The only penalty for the D31 is weight (63lb).