The dealer near me installed a hogtunes set up in the show room so people could watch. They installed the Big Ultra Kit which is the four 5 1/4" speakers driven by the NC40 160 watt amp (40 per channel) that mounted on top of the factory radio leaving the CB in tact.
They also put the 7" woofer kit in the lowers driven by the new NC70 140 watt amp (70 per channel). The NC70 also fit in the batwing fairing with a real slick mounting bracket that includes a custom fairing support for the left side near the speaker. It looks like the OEM fairing support is replaced by the Hogtunes support bracket. Very clean set up and sounded really good. I must say I was impressed.
I still have the stock speakers. They suck.

 

Do yourself a huge favor, and look around first. You can do alot better than Hogtunes. Just my opinion. I've done a couple of upgrades. Hogtunes was my 1st one from stock. Plus, you probably heard it while it was inside?

 

I got the Big Ultra kit with the tweeter pod setup installed last year at Sturgis and it made for a great ride home. I just got the FL7Rev Kit which are the 7" woofers for the lowers and the 140 watt 2 channel amp for my birthday but haven't installed it yet because my birthday isn't until 3/18 and the wife has a thing about me playing with toys she bought me as gifts early, LOL!

I really like my Big Ultra kit though and I am looking forward to installing the new setup.