Okay the TRD first came out in 1998. They had them on the stand cab and ext cab until 2000 when they stoped with the standard cab and started a prerunner with TRD. The SR5 is a trim package. you get crome,cd,etc. the TRD kit will come with 16alloy's with 265/70/16 rugged BFG'S,progressive front coils,fender flares,stickers,locker,and the shocks. If you ever think you will install a locker get it. if not it is a waste of money.

2003 TRD EXT.CAB V-6 SR5
supercharger+urd fuel mods
6inch fabtech+1RB
35 BFG MT 4.88's Stubbs sliders