Alright guys, ive got a friend that has a truck and i plan on getting him som speakers for his ancient truck. I think its a tacoma from the early 90s but im not exaclty sure. I really dont know anything about coaxial and componenet stuff all i know is the dimensions of the speaker holes. In the front theres on each side one circular hole with a diameter of about 4 inches and in the back theres, on each side, one square hole about 4inches by 4inches any help would be great. I'm looking for some relatively cheap stuff because he doesn't really care all to much. Oooh almost forgot, he also newds a new head unit that has an aux input for the ipod. Thanks for the help.