These Manley Chrysler Hemi 6.4L pistons are perfect for car enthusiasts looking to boost their engine's performance. Whether you're into racing or just want a more powerful daily driver, these pistons are a great choice. They have a 4.100 - inch bore, a 4.050 - inch stroke, and come in a set of 8. The 2618 alloy forgings ensure they can handle high - pressure situations, and the special wrist pins add to their long - lasting quality.