Injector Dynamics Subaru WRX Bottom Adapter 14mm to 16mm | WRX-16B
Video description
Installing Injector Dynamics injectors on your Subaru? The Injector Dynamics WRX-16B Bottom Adapter is designed to provide the correct fitment when converting from a 14mm injector bottom to a 16mm bottom, ensuring a proper seal and installation.
This adapter replaces the factory Denso injector cushion while adding 3.5mm of installed height, making it an essential component for compatible Injector Dynamics injector setups. Precision-machined and finished in anodized gray, it's built for long-lasting durability and reliable performance.
Features:
- Genuine Injector Dynamics Bottom Adapter
- Part Number: WRX-16B
- Converts 14mm bottom to 16mm bottom injectors
- Replaces the factory Denso injector cushion
- Adds 3.5mm of installed height
- Compatible with all Injector Dynamics injectors
- 14mm x 1mm bottom O-ring (16mm OD)
- Durable anodized gray finish
- Sold individually
Fitment:
2008–2014 Subaru WRX
2008–2021 Subaru STI
2005–2009 Subaru Legacy GT
Whether you're upgrading your fuel system for higher horsepower or replacing injector components during an install, the Injector Dynamics WRX-16B adapter helps ensure a proper, leak-free fit.
Shop Injector Dynamics fuel system components at Import Image Racing:

