I just recently put subs and an amp in my single cab truck, but it still has all stock speacker in it. I am wanting to know do i need to replace these and if i do what should i get?
Give us some more info. You don't NEED to replace anything unless you think it sound like crap. Generally if you're adding a sub, the stock speakers won't be able to keep up and get drowned out by bass so it'll certainly sound better if you replace them. Answer these for us and then I'm sure we can point you in the right direction.
What kind of truck? Do you know what size speakers it has stock? Are you looking to get components or coax? BUDGET? <-That's important! Would you be looking to amp the speakers? What head unit are you running? What kind of music do you listen to? What Subs and amp are you running <-That's really just out of curiosity