jugs and pistons are not included, you can use your stock jugs, and then buy the pistons in the overbore you need, they are listed right with the hot setup in the catalog, you can vuiew the catalog page by searching for 420-157, and clicking on catalog pages, then click on the page number. the hl2t is just a simple method of causing the tappets to lock up at higher rpm, it's basically just a set of o rings