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AMS EJ25 Intake Manifold Reverse Rotation - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

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Intake Manifolds >AMS EJ25 Intake Manifold Reverse Rotation - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

AMS EJ25 Intake Manifold Reverse Rotation

Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

Product Resources

Questions (4) Answers (4)

Fitment Details

Features & Product Details

RallySport Direct proudly carries performance products brought by you by the record holders at AMS Performance.

Here, you are looking at the AMS Performance EJ25 Reverse Rotation Intake Manifold. This manifold has been designed for those looking for the right intake manifold to accommodate big horsepower setups. AMS utilized computational fluid dynamics software and the result is a larger plenum size of 4.5L for more top-end power, along with CNC machined bellhorns which act as internal velocity stacks which will allow for a broader power curve and high RPM horsepower capabilities.

FEATURES:

Reverse Rotation setup

4.5-liter plenum volume

13" Equal length intake runners measured from the face of bellhorn to end of the runner

2.5" (63.5mm) intake runner diameter

Bellhorn OD 3.8" (96.7mm)

TGV housing replaced with long runner design

Increased port size at cylinder heads allow matching to larger hand ported or CNC ported cylinder heads

Throttle body opening accepts larger throttle bodies up to 2.625" (66,675mm) or 70mm with mild porting

This version intake manifold is available with a standard orientation

Bottom of the center plenum features 4-1/8" and 1-1/4" NPT spots for vacuum accessories

Uncoated, textured ted, gold, bronze, black, and blue colors available

FITMENT NOTES:

NOT BOLT ON, PLEASE READ ALL NOTES BELOW FOR NECESSARY MODIFICATIONS

Some port matching of the manifold may be required when used in conjunction with CNC or hand ported cylinder heads

Larger throttle bodies can be used with proper modifications (up to 70mm with minor porting, larger throttle bodies may also require adapter flanges)

The intake manifold is flanged for 04+ STI drive by wire throttle bodies, other models (such as 08-14 WRX) require a change to the STI style throttle body

Cable throttle bodies (such as 02-05 WRX) can be used with custom fitting and flange adapter

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

Designed to use common Subaru AFTERMARKET top feed injector size (48mm overall length / 11mm inlet-standard Subaru rail size / 14mm outlet)

Not compatible with OEM subaru injectors

Not compatible with stock fuel rails or lines, requires aftermarket top feed rails and lines

Not compatible with top mount intercoolers

Not compatible with hard pipe stock location turbo inlets, requires silicone inlet

Not directly compatible with mounting the factory upper coolant reservoir

Product Resources

Questions (4) Answers (4)

Fitment Details

Specifications

Brand: AMS

Finish: Powder Coated

Installation Hardware Included: No

Material: Aluminum

Mfgr. Warranty: No Warranty

Condition: New Product

Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.

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QUESTIONS & ANSWERS

Q: Reverse manifold TSUNAMISTI 26 days ago
I previously asked a question about using your ams manifold in the reverse position, I know the ams reverse manifold doesn't have an upward angle to clear my alternator but the other model appears to have an upward angle that I need to clear the alternator. Any thoughts on fitment? Thank you
- 1 of 1 people found the following answer helpful
  A: The reverse rotation intake manifold requires an alternator relocation and A/C delete, it is not a direct bolt in and requires modifications. Trying to modify the standard intake manifold in to a reverse mount would also require modification. We have not done any fitment testing.
  Lane H. @ RallySport Direct 11 days ago
  
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Q: Reverse manifold fitment TSUNAMISTI 2 months ago
I currently run the stock subaru sti manifold reversed with the alternator in its lowest location and with a 19mm spacer under the manifold. The stock manifold throttle body is angled upwards allowing it to clear the alternator. Does your reverse manifold throttle body inlet have a similar upward angle? 2013 subaru wrx sti. Thank you
- 1 of 1 people found the following answer helpful
  A: The reverse configuration actually appears to angle down.
  Lane H. @ RallySport Direct 26 days ago
  
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- 1 of 1 people found the following answer helpful
  A: Here is the reversed manifold.
  Lane H. @ RallySport Direct 26 days ago
  
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Q: Stock head fitment Jacob4 months ago
Do the heads need to be CNC ported to fit this manifold or does it come ported specifically for stock heads?
- 1 of 1 people found the following answer helpful
  A: This manifold should be able to work with stock heads.
  Jesse F. @ RallySport Direct 2 months ago
  
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Q: 2017 Wrx Nick5 months ago
Will this manifold fit on a 2017 wrx?
- 0 of 0 people found the following answer helpful
  A: No, this is meant for EJ engines, not the FA in your WRX.
  Lane H. @ RallySport Direct 1 month ago
  
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