AMS Intake Manifold Textured Red Subaru WRX 2002-2014 / STI 2004-2021 | AMS.31.08.0001-2

Upgrade your Subaru WRX or STI with the AMS Performance Intake Manifold! This high - performance intake manifold is specifically designed for Subaru EJ20 and EJ25 engines in 2002 - 2014 WRX and 2004 - 2021 STI models. It outperforms the competition, offering unmatched power gains and excellent response. Key Features: - Texture Red Powder Coating: Not only looks great but also provides durability. - Standard Rotation Configuration: Ideal for most setups. - 4.5 Liter Plenum Volume: For ultimate top - end power. - 13' Equal Length Intake Runners: Ensure smooth airflow and maximize power output. - 2.5' (63.5mm) Intake Runner Diameter: With a Bellhorn OD of 3.8' (96.7mm). - Increased Port Size at Cylinder Heads: Allows for matching to larger hand - ported or CNC heads. - Throttle Body Opening: Accepts larger throttle bodies up to 2.625” (66.675mm) or 70mm with mild porting. Fitment Information: - Will fit 02 - 05 WRX with EJ20 only with an adapter to use a WRX - style drive - by - cable throttle body. - 08 - 14 WRX with EJ25 requires using an STI - style drive - by - wire throttle body. - 08 - 21 STI may need mild clearancing of the A/C compressor line. Product Notes: - Due to the variety of rotated turbo kits, fitment with every brand is not guaranteed. - Some port matching may be needed with CNC or hand - ported cylinder heads. - Larger throttle bodies can be used with proper modifications. - The intake manifold is flanged for 04 - 21 STI drive - by - wire throttle bodies, but cable throttle bodies can be used with custom fitting. - Standard configuration intercooler piping needs mild custom fabrication. - Designed for a common Subaru aftermarket top - feed injector size. - Standard Subaru style injectors cannot be used. - Not compatible with side - feed to top - feed conversion rails. - Requires aftermarket rails and lines. - Not compatible with top - mount intercoolers. - Not directly compatible with mounting the factory upper coolant reservoir. - The bottom of the center plenum has four 1/8″ and one 1/4″ NPT ports for vacuum accessories.

Using the AMS Performance Intake Manifold is a great way to boost your Subaru WRX or STI's performance. First, check if your car model (2002 - 2014 WRX or 2004 - 2021 STI) and engine type (EJ20 or EJ25) match the fitment requirements. If you have a 02 - 05 WRX with EJ20, you'll need an adapter to use a WRX - style drive - by - cable throttle body. For 08 - 14 WRX with EJ25, use an STI - style drive - by - wire throttle body. When installing, be aware that 08 - 21 STI models may need mild clearancing of the A/C compressor line. Due to the large variety of rotated turbo kits on the market, double - check for any potential interference with the cylinder 3 intake runner. If you're using CNC or hand - ported cylinder heads, some port matching may be required. You can use larger throttle bodies, but they'll need proper modifications and possibly adapter flanges. Maintenance is simple. Keep an eye on the texture red powder coating. If there are any signs of chipping or wear, you can touch it up to prevent corrosion. Regularly check the intake runners and plenum for any debris or blockages. When it comes to injectors, use the recommended Injector Dynamics brand injectors, as standard Subaru style injectors won't work. And always remember, this intake manifold requires aftermarket rails and lines, so make sure they're in good condition.