Cores and piping kits are available separately. You MUST buy one of each to make a complete kit.
The Perrin Front Mount Intercooler (FMIC) kits for the 2015-2021 STI are massive upgrades. The full Perrin FMIC kit is designed for big horsepower applications! These are intercooler pipes designed to work with the PERRIN Performance Front Mount Intercooler (sold separately here).