S&J engines come with a seal kit, they install all of them except obviously the valve cover, timing cover, and oil pan and a few others. They will also send you break in oil that you run for like 500 miles. Only thing I bought was my clutch, and the usual tune up stuff like spark plugs, spark plug wires, and some sensors I felt I wanted to replace while I had it apart. I also replaced the motor mounts while I had the motor out. Everything else I just swapped from the old motor to the new motor. Oh and lastly I did have to get a new dip stick tube because the one on my motor was seized pretty good in there.