Basically a fully built transmission.
All the billet shafts, flexplate, tq converter, valvebody, and upgraded clutches, steels, pistons and bands. Suncoast builds a really tough trans as does NADP. Some guys have had great luck with ATS and DTT. All are pretty close in price, each hase there own little pros and cons. I love my Suncoast. I just started selling NADP. So, I would recommend those two not because I sell them but because I use them.
Jason