Upgrade your Subaru WRX, STI, or Legacy GT with the Injector Dynamics Subaru WRX Bottom Adapter 14mm to 16mm. This adapter is sold individually and is designed to fit all ID injectors, providing a seamless conversion from 14mm bottom to 16mm bottom. By replacing the Denso cushion and adding 3.5mm installed height, this adapter ensures a perfect fit. The 14x1mm bottom o-ring with a 16mm OD guarantees a secure seal. Finished in anodized grey, this adapter is a stylish and functional addition to your vehicle. Compatible with Subaru WRX 2008-2014, Subaru STI 2008-2021, and Subaru Legacy GT 2005-2009.