I have a capacitor connected to my amp running off 4 guage wire. I also have another amp with its own 8 guage lead. Is it possible to just attach this 8 guage to the capacitor instead of having another wire all the way up to the battery, or do I need some sort of distribution block? Thanks

I would use a fused distribution block personally. 4 ga in from the cap, then 8 ga out to the 2 amps.

Yupp - same as above...

Runn your 4g wire from the batter to the cap - from the cap to a dist. block - the run either two 4g or to 8g to the amps !