I'm gonna be installing an amp and sub to my stock 2001 headunit. Is there an adapter that i might need? or does the stock unit have the rca jacks already?

 

no, the head unit doesn't already have rca jacks, just pick up some line-level converters off of crutchfield.com or you can even get them at best buy, tweeter, or even circuit city. it just runs off of one of your stock speaker feeds.
peace

 

yep you either have to do the above...OR use an amp that accepts SPEAKER LEVEL INPUTS....

 

Thanks for the input folks, got everything hooked up and it sounds great! 1st mod to my car - finally!

Next - wheels and suspension upgrade! Which means I'm looking to buy the stock es/lx 4lug alloys