Not as pretty as when it shipped:
Next to my lithium battery:
Supercapacitors tucked into my spare well:
Lithium battery had to move to the back, these caps are BIG! They nearly fill the footprint of the original 12v battery.
I'd say the 400F caps were entirely inadequate for starting the car, but these caps are huge. Probably an ideal size for my car would be ~1200-1600F. On the flip side, the starter really cranks now.