These Manley pistons are perfect for car enthusiasts looking to upgrade their engines. They are designed for specific models like the 2003 - 2006 Mitsubishi Lancer Evolution. Use them when you want to boost your car's power and performance. The pistons have an 85mm STD bore and an 8.5:1 dish. They are made from high - quality 2618 alloy and come with premium Chrome Moly wrist pins, ensuring a long - lasting and powerful engine upgrade.