I've only had my truck for 3 1/2 weeks and I'm already doing mods!
I have added a set of components, replaced the HU, added a sub box/MTX Jacker Hammer 10", 20" wheels and tires, OEM painted to match running boards and a Kicker 5-channel amp.
The components are PowerBass and they only cost me $65. I also picked up a set of 6x8 PowerBass replacements but haven't installed them yet. The HU is a Jensen VM9022. I already this from my Mustang. I used to have a D3 and I like the Jensen much better. I bought the 20s for $700 off of Craigslist and they are in excellent condition. I also picked up a set of OEM running boards for $150. In addition to all that I snagged a set of OEM fender flares for FREE. Here are a few pics and there are more in my gallery: