They are finished. One a side note, I had the opportunity to see the Techco supercharger in person at Atco a couple of months ago. The car was idling with the hood up and the owner was complaining about how noisy it is. He said his wife won't even drive it now because of the grinding sound. I had to agree it was loud and I also thought the fit and finish was kind of sub-par. Even the plastic air filter housing had rough edges. The guy showed me his 10 lb boost dynojet sheet and it made about 470 rwhp...not impressed after all the hype. That's pretty much the standard twin screw hp level at 10 lbs boost.