Finally got the Boss manifold installed and took it out for a quick drive. I had 4.10 gears installed a couple weeks ago on my 6mt. It was silly fast and spun the tires constantly. The engine felt rough and didn't feel comfortable when driving at or above 2500 rpms. The install went easy except the Airaid intake was a bit more than I wanted to do. You have to trim the coupling at the throttle body like others have said. I ended up taking close to an inch off each end at the top to fit to my taste instead of the 1/2 inch like others have done. With the Boss installed the car sounds quieter and revs really smooth. The uncomfortable feeling at or above 2500 rpms is gone. When it gets around 5000 rpm it really wants to go. I am running a Lund tune both prior and current. I did an initial dyno pull after having the 4.10 gears installed. I understand the numbers are a tad low for a Lund but I am running extra safe. I will take it in a couple weeks and have another dyno pull done to see the difference with the new manifold.