These Manley pistons are perfect for car enthusiasts who want to boost the performance of their engines. They're designed for specific models like the Mitsubishi Lancer Evolution from 2003 - 2006 and other similar cars. The pistons have an 85mm standard bore and a 9.0:1 dish design. Use them when you're looking to upgrade your engine for better power and durability, whether it's for daily driving or more intense racing situations.