Well
You drop the pan, if its been there a long time, you will need a new gasket. Most kits usually come with this. Bulkpart as the name implies is a wholesaler to transmission shops. Rebuild kits come with these parts so costs are kept lower by not supplying them extra. There are two O rings (large & small)that seal the filter to the valve body. Forget these and transmision will shift funny when it sucks in air. The filters do come with new bolt and hardware. Some have used the old hardware and found the bolt bottoms out before the filter is tightened. The bolt is recessed so it is not obvious. Five hundred miles later it starts shifting funny after the filter drops down. I mention SPX because other cheaper metal screen filters that can't filter anything) are offered. MicroFelt is the trademark for the fiber element filter
