The ultra best capacitors are tantalum capacitors, mainly use in computer motherboard to power up CPU and GPU. Tantalum capacitors should be arrange in PCB board, in parallel configurations. They last almost forever and got the most rapid charge / discharge power.
The next alternatives ( and cheaper ) are electrolyte low ESR capacitors.
If you want to lower the ohm, simply double the capacitors in parallel mode.
Don't use too many capacitors , 1. the car looks crowded, un-cool, geek. 2. There is impendance factor that somehow lower the battery voltage.... perhaps a few milivolts.
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