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I know some folks have done it, but I wouldn't use 4 AWG cable. I would go for 2 AWG minimum. I've got 1 AWG for mine.
 

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toolapcfan said:
A nice alternative to battery relocation is to get one of those dinky ass, lightweight odyssey batteries.
Or, you could do both. We have a battery relocation box available for the WestCo batter. The box is 8x8x7. Nice and small. It's sealed (and a vent is available to make Bubba the tech inspector happy) and the same all-thread that bolts the box to the trunk also holds the battery down (an nice safety feature). Team "Kickback" in SE-R Cup runs it. :D
 

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Sentra_Industies said:
I thought Optima batteries didnt vent cause they were special type or something.
No, you need to vent an Optima. It is a gell cell. You don't need to vent a WestCo since it's a dry cell battery.

That said, Bubba at your local track or autocross may still like to see the vent.

You should never use a non-sealed battery box and a 4AWG cable is too small. That is the size cable the factory uses for the short length under the hood. For the long cable you must run from the truck, a 2AWG cable should be considered the minimum size.
 
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