I've got 09 Sedan and will be running some amps. I need an Optima Yellow Cap battery, but I'm not sure which one to get. Optima site says a D35 8040-218, but another site said there is none that fit our Si.
Also, where can I get one in Sacramento area? Costco up here no longer carries the Yellow.

 

i'm searching on optimas website and its giving me part numbers D35 (8040-218) or D51R (8073-167) for yellow tops. now the thing is it didn't ask me for the trim level. I'm assuming they should fit. i've seen some yellowtops at autozone or kragens. you can also go there and ask them which ones fits on your car and ask if it doesn't fit if you can return it.

 

That's what I found as well. I was expecting to find a D34, but they say D35...difference?

 

I have a yellow top in my EK if ya want i can go see the model number for ya, sorry but i didn't realize you have an 09...so im not sure

 

I say optima is way over rated and you should go with Kinetik or Shuriken(I think thats how its spelled)

 

I never actually heard of those brands...whats the price different? tell you the truth though, a Full Optima battery ran my engine plus accessories for 2 hour drive before it finally died...

 

The Kinetics are cheaper and the Shurikens are even cheaper than that I just like the Kinetik's look. I guarantee a Kinetic would out perform an Opima any day hands down.

 

Oh yea? I will look into that if my Optima ever dies...BTW i wouldn't buy a aftermarket battery, except my car came with it...

 

I decided to go with a Kinetik HC1400R. Fit great and works great, too. No dimming or any other issues. Thanks for the help.

 

thats good...Glad we could help