Well, my kit was pretty much retail. $5600 and it was NOT polished. Was gonna be an extra $800 for polished. I thought the non-polished version looked just fine for me. I did entertain the idea of having it installed. It was gonna cost me $750 for install, and the guy at the shop said it would take about a day. I was scheduled to have it installed at the shop on the day after arrival of the sc, but during my wait for UPS, I downloaded the manual from magnacharger and read it probaby 3-4 times. By the time my sc was delivered I was more than confident that I could do this job myself, with the help of a few buddies. Everything took 12.5hrs with me and 3 friends working on it all night. Me being the key installer that night, dropped the fuel tank, replaced fuel pump, placed supercharger on block, ran belt, torqued everything, installed air box, did electrical, etc.. having some friends with extra hands was priceless. Of course we stopped several times to just shoot the sh** and enjoy ourselves, but also took our time to make absolutely sure that everything was done right. If I had to do it again, I would like to think that I could probably shave off about 3-4hrs from install time. The install manual was very well put together with tons of illustrative photos. Anyways, I'm rambling. My mechanic owns/operates Mac's Performance in Benbrook, TX. He runs a very high class perfomance shop. If he says it will take a day and only cost $750 to install, then I would work around that figure.
Good luck to ya.
Install not recommended for the guy that is still afraid to change his own oil.
Grizzy