Scosche Wiring kits from walmart?
 

Are they any good? Im gonna be running a jl 500/1 v2 do you think a 4 gauge scosche E2 will do the job

It will work for your application yes!

do you think that i will have ne problems with it in the future or will it be just as good as any

It should be just as good. Is it copper clad aluminum or pure copper? Check out Ebay as well because there are always good buys to find on there.

i got it from ebay how do i know if its pure copper

it says 9.5mm hex power cable

If it says 4 gauge cca its copper clad aluminum. CCA cable has lower conductivity than copper so 4 gauge CCA is like having 8 gauge copper.

it doesnt say cca anywhere so it could be pure then