Manley are the leader in forged pistons to suit the 5.0 lt supercharged engine. The pistons comes with pins and c clips. This is the piston I chose when building a 5.0 lt supercharged engine. The pistons are available in std , .005 and .010 th over sizes. The piston compression ratio is 9.0;1 and has a 12 mm dish. Pics are for illustration only. 000136478