These manufacturing methods produce pistons having a significantly lower cost per unit than pistons manufactured by a machining process wherein the piston core is machined, a seal is manufactured, and the core and {HEAD ~ the seal} are mated to form {TAIL ~ the finished piston} 
are mated to form
These manufacturing methods produce pistons having a significantly lower cost per unit than pistons manufactured by a machining process wherein the piston core is machined , a seal is manufactured , and the core and { HEAD ~ the seal } are mated to form { TAIL ~ the finished piston }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL