Polks Midbass is 4 ohms, so the midbass actually loss some of it's power, how ever the tweets are 4ohms vs the oe 8ohms so they're a little bit louder. I wished the midbass was a little bit louder, and it is noticeable. If I had to do it over again, i would have gone with the Infinity 6030cs. If you want my polk set, i can sell them to you already pre wired, but they do fit right into the tube. I'd just take a plyer and move the bolt holes to a 90° so it doesn't scrape the tube.

There's really not that much information about drop in aftermarket set besides the thread you have. I'm kind of sad actually, was scared to install them myself (since it's my first time) but the T-Taps made the install very easy.