Pistons pushing inward, and pistons pushing outward. This also included shot peened and forged pushrods, connecting rods and pistons. The engine uses custom Mahle pistons and rods. The callipers are aluminium alloy bodied with titanium pistons. It is equipped with high-strength forged aluminium alloy pistons. Some designs avoid sliding surfaces altogether by using diaphragms for sealed pistons. Early engines used pumps driven by the motion of the pistons. PM7 pistons, 43 cc Pent roof combustion chamber. Edwards played four seasons with the Detroit Pistons. The rivalry between the Lakers and the Detroit Pistons developed in the late 1980s. Webber signed with the Detroit Pistons shortly thereafter. The Celtics again lost to the Pistons in the playoffs. However, Parker struggled in the Finals series against the Detroit Pistons. He was courted by several teams including the Phoenix Suns, Detroit Pistons and Miami Heat. He has also served as head coach of the Indiana Pacers and Detroit Pistons.