Originally Posted by
4X4 UFO
My head unit is a Pioneer DEH-P3900MP, but I believe it has been replaced by DEH-P4000UB. It costs $164. You may be able to use a less expensive unit if you don't need the USB connection or I-Pod controls. The speakers are Infinity 6022si. They are $89 a pair. The speakers are currently shown to be out of stock, but the Crutchfield rep will let you know when they expect to have them in stock. It's usually not too long. Go ahead and get the 6 1/2" speakers for both front and rear. It takes a little modifying for the rear speakers, but it's well worth it. There's a good write up about here somewhere. The search feature will find it for you.