AMS EJ25 Subaru Intake Manifold - Texture Red Powder Coating AMS.31.08.0001-2

Applications:

1. For 02-05 Subaru WRX w/ EJ20 (Requires adapter to use WRX style drive by cable throttle body)

2. For 06-07 Subaru WRX w/ EJ25?Çó 08-14 Subaru WRX w/ EJ25 (Requires using STI style drive by wire throttle body)

3. For 04-Current Subaru STI w/ EJ25 (2008+ STI may require mild clearance of A/C compressor line)

4. Will fit various Legacy and Forester EJ25 applications with proper throttle body usage and custom fitting

AMS had analyzed many modern design examples and engineering studies to bring you the best intake manifold available for the Subaru EJ20 and EJ25 WRX & STI. 

After extensive testing AMS had ended up with a manifold that makes more power than anything else currently available on the market.

There are significant improvement features embedded in this new design with substantial benefits to excite.

- 4.5 Liter Plenum Volume

- Equal Length Intake Runners (Measured from Face of Bellhorn to End of Runner)

- 2.5” (63.5mm) Intake Runner Diameter (ID of Bellhorn)

- Bellhorn OD 3.8” (96.7mm)

*Increased Port Size at Cylinder Heads Allow Matching to Larger Hand Ported or CNC 

*Ported Cylinder Heads Available in Standard or Reversed Configuration

*Throttle Body Opening Accepts Larger Throttle Bodies up to 2.625” (66.675mm) or 70mm with mild porting

*Available in 4 Configurations (Standard, Standard Coated, Reversed

and Reversed Coated

**Product Notes.

A. Due to the large variety of rotated turbo kits on the market, AMS cannot guarantee fitment with every brand. Depending on the turbo location and sizing, interference with the cylinder 3 intake runner is possible.

B. Some port matching may be required when used in conjunction with CNC or hand ported cylinder heads.

C. The intake manifold is available with a standard or optional reverse throttle body orientation, allowing for more direct intercooler pipe routing.

D. Larger throttle bodies can be used with proper modifications (Up to 70mm with minor porting) (Larger throttle bodies may also require adapter flanges)

E. The intake manifold is flanged for 04+ STI drive by wire throttle bodies, but cable throttle bodies can be used with custom fitting and flange adapter.

F. Standard configuration intercooler piping will need mild custom fabrication due to placement of throttle body.

G. Reversed configuration requires the relocation of the alternator and removal of the A/C compressor. 

H. Installation is not a direct bolt on and will require custom intercooler piping.

The intake manifold is designed to use a common Subaru aftermarket top feed injector size (48mm overall length / 11mm inlet, standard Subaru rail size / 14mm outlet).

It is recommend the use of Injector Dynamics brand injectors as Standard Subaru style injectors cannot be used (Side Feeds, Stock STI Style Injectors). Not compatible with side feed to top feed conversion rails. 

Requires aftermarket rails and lines, will not fit with stock. Not compatible with top mount intercoolers.Not directly compatible with mounting the factory upper coolant reservoir. 

Custom bracket will need to be fabricated to mount. The bottom of the center plenum features four 1/8” and one 1/4” NPT ports for vacuum accessories.

The 2008+ STI may require mild clearance of A/C compressor line.

The AMS EJ25 Subaru Intake was engineered to be the best for the Subaru. It takes years of engineering experience from AMS to built the best intake like this. 

Designed, prototyped and tested in house by AMS team of engineers, the AMS Subaru EJ Intake Manifold was created to be the best unit available on the market. 

Unmatched power gains and excellent response noticed. This AMS Subaru EJ Intake Manifold offers more than just top end power. 

This manifold gives you an amazingly wide power-band with a huge jump in power whenever you are in boost. 

This will greatly improve lap times on the road course or even in circuits. 

AMS EJ25 Subaru Intake Manifold - Texture Red Powder Coating AMS.31.08.0001-2