Anyone know if the Optima yellow tops fit without modifications?

Which yellow top fits without modifications?

I have one. Works awesome! go for it!

yellow top or red top?

optimum yellow if you have a lot of electronics (deep cycle)

Red Top for cranking!

Which yellow top fits without modifications?

Isn't $185 for a battery a bit much? Are they really that much better than some of the other high quality batteries available?

yes!!! the deep cell batteries are amazing, but yea like stkjock said yellow for electronics like a system of tvs or something, and red has the cranking power to start it up with easy...or if you go with a cheaper battery try always turning your ac/heat and radio off before you turn the engine off, or at least before you start it back up...you would be surprised how much easier it is on battery when you do this, especially the cheap batteries they put in these things lol

I've had my original battery for over 2 years and 39,000 miles now with no problems. I believe the battery that comes with a vert is more heavy duty to handle the roof going up and down. I'm thinking whatever came stock in my '06 would do very well in a coupe.

Although the Yellowtop is a deep cycle/cranking combo, unless you're running electronics with the engine NOT running for any length of time, the deep cycleaspect is a waste of money. When the engine is running, your alternator should be able to provide whatever power you need with anything beyond the alternator's capacity coming from the battery, which shouldn't be much and SHOULD only be short duration. IF you're pulling that much power from your stock alternator, you should buy a HO alternator.

isnt the red top still better than any other regular battery? i have a red top in my 66 mustang with a 302 and it starts up faster and betterthen my 08BULLITT
ive also heard with the optima batteries that you can drain them dead and put them on a battery charger over night and they'll be evenstronger then they were before

Batteries are fickle beasts. I've seen such variations even within the same manufacturer's product line that it makes me wonder. My stock battery in my Toyota is 8 years old (I know I'm playing with fire but I'm curious to see how long it'll last). I believe that if you make a lot of short trips that you'll decrease battery life as compared to those that drive steady an hour or more per day, essentially giving the battery a decent recharge.

I tournament fish and few of the club members have Optima's. They DO last longer than most conventionals but don't produce any more power. In marine use, I suspect the cell construction can take more punishment in rough waters then the marine lead acid cell constuction. As far as use in a car, I think they're overkill... But then again, I use Amsoil but also think Mobil1 (at 1/2 the cost) is just as good, so go figure.

I currently have the red top due to my other battery dying on me and not being able to re-charge all that well...and since it is a redtop optima battery it has a jelly rather than regular acids inside of it and hence will last me longer through the summer. :D

I know I need a Yellow Top. An upgraded ALT and a reserve batt in the trunk should probably be on the list as well. My amplifiers can pull well over 200amps if it were available.

My only question right now is which yellow top fits without modification.

what kind of system do you have because im asuming thats why you want the yellow top?

ORIGINAL: 08Bullitt215

what kind of system do you have because im asuming thats why you want the yellow top?


Sundown Audio SAX100.4 with Infinity 682.7's and stock 8's.
JBL 1200.1 with a SSA Icon 12"

i still think the red top would be fine but the yellow top will do as well... up to you... but nice system

I had a Kicker KX1200.1 and a KX650.4 in my truck. I had a yellow top and never had any problems. It's always better to have more, than to get something smaller and realize you need more.

However, after I saw how much that systembeat up the truck I'll never do anything like that again.

ORIGINAL: 08Bullitt215

i still think the red top would be fine but the yellow top will do as well... up to you... but nice system


I have a XLT Performance Series NXDT34 from Sam's Club that was in my Buick. Its just like a optima red top. I was going to put it in the mustang, but its a little to tall so the strap won't reach. I'll have to figure out a way to get it in there.

i see i see...hmm... good luck

Red top hands down.
The engine starting will take a toil on the yellow tops.
Extra batteries in the trunk is pointless unless you plan
on running the 200Amps of amps with the engine off.
Put the $$ into an Extra Heavy Duty 300Amp alternator instead.
Alterntors produce amps and batteries just store amps.
A cap in the rear is just for instantanious needed amps
and dont supply amps for very long.

ORIGINAL: 157db

Red top hands down.
The engine starting will take a toil on the yellow tops.
Extra batteries in the trunk is pointless unless you plan
on running the 200Amps of amps with the engine off.
Put the $$ into an Extra Heavy Duty 300Amp alternator instead.
Alterntors produce amps and batteries just store amps.
A cap in the rear is just for instantanious needed amps
and dont supply amps for very long.


exactly. a battery is just another loadon the alternator. getting a bigger battery will, in effect, hurt the alternator because now it has to work harder keeping it charged. with a system, the bigger alternator is needed. if you see your headlights dimming, that is because your alternator can not keep up with the loadthat the amps are drawing, and the batteryis nowhelping out.this causes the alternator to have 2 jobs now,suppling the vehicle and recharging the battery. if you are just replacing the ford battery and are running the stock electronics, then use a red top(if you want to spend that kinda cash), yellow tops are deep cycle batteries, they are designed to be used with the car off. can you use them as a starting battery, sure but you will not get the service length from them as a red top. If you are running a high amp system, get a bigger alternator and upgrade the size of the stock power wire and ground wire, so the current can flow better.

From what I learned:
The standard 800 CCA Optima Red Top fits perfectly even though its a group 34.
Look for a group 40R battery.
I personally havent tried the fit yet-still have the stock battery. I dug up the above info awhile back after having a dead battery.
Hope this helps.

I am using Wal Mart's (not walmart brand) 1000 amp crank batteries in two of my cars and soon to be three. They have been just great and carry a three year free replacement warranty! Last time I checked they were about $80