AMS Intake Manifold Uncoated Subaru WRX 2002-2014 / STI 2004-2021 | AMS.31.08.0001-1

Upgrade your Subaru WRX (2002 - 2014) or STI (2004 - 2021) with the high - performance AMS Intake Manifold! Engineered by AMS with years of experience, this uncoated manifold is designed for big HP setups to outperform the competition. It has a 4.5 - liter plenum volume and 13 - inch equal - length intake runners, offering exceptional airflow and power. The large port size at cylinder heads allows for easy matching with larger ported heads. It can accept larger throttle bodies up to 70mm with mild porting. Please note: 02 - 05 WRX with EJ20 needs an adapter for WRX style cable throttle body; 08 - 14 WRX with EJ25 requires an STI - style drive - by - wire throttle body; 08 - 21 STI may need mild A/C compressor line clearancing. Due to various rotated turbo kits, fitment isn't guaranteed for all brands. Some port matching may be needed with ported cylinder heads. The manifold uses a common Subaru aftermarket top - feed injector size and requires aftermarket rails and lines. It's not compatible with side - feed injectors, top - mount intercoolers, or factory upper coolant reservoir without custom fabrication.

Using your AMS Intake Manifold is a great way to boost your Subaru's performance. First, make sure to check the fitment information based on your car's model and year. If you have a 2002 - 2005 WRX with EJ20, you'll need an adapter to use the WRX style cable throttle body. For 2008 - 2014 WRX with EJ25, use an STI - style drive - by - wire throttle body. When installing, be aware that the 2008 - 2021 STI may require some mild clearancing of the A/C compressor line. Also, due to the variety of rotated turbo kits on the market, there might be interference with the cylinder 3 intake runner, so double - check before installation. Some port matching may be necessary if you're using CNC or hand - ported cylinder heads. You can use larger throttle bodies, but you'll need to make proper modifications and may require adapter flanges. The intake manifold uses a common Subaru aftermarket top - feed injector size, so make sure to use the recommended Injector Dynamics brand injectors and aftermarket rails and lines. As for maintenance, keep an eye on the intake runners and plenum for any signs of dirt or debris. You can clean them gently with a suitable cleaner. Also, regularly check the connections to ensure they're tight and secure. Remember, this manifold isn't compatible with side - feed injectors, top - mount intercoolers, or the factory upper coolant reservoir without custom fabrication, so plan your setup accordingly.