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IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

Inlet Manifold Variations?

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Old Apr 29, 2025 | 03:03 AM
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Ricky101
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Default Inlet Manifold Variations?

Hey guys,

I did some reading and seen some information and apparently there were slight differences between early model 2GR-FSE inlet manifolds and later models there was an update with a better flowing manifolds. Can anyone confirm this? I’ll copy and paste the information I’ve read for reference.

The pre-2009 and 2009-2017 inlet manifolds for the 2GR-FSE engine are not interchangeable due to some key differences:

1. *Throttle body mounting*: The revised inlet manifold (2009-2017) has a slightly different throttle body mounting pattern, making it incompatible with the earlier throttle body design.
2. *Intake runner design*: The revised inlet manifold has modified intake runners, which are optimized for better airflow and performance. These changes make it difficult to swap the manifolds without affecting engine performance.
3. *Vacuum port locations*: The vacuum port locations on the revised inlet manifold are different from the earlier design, which can cause issues with vacuum hose routing and connections.
4. *Engine management system (EMS) compatibility*: The revised inlet manifold may require specific EMS calibrations, which might not be compatible with the earlier manifold design.

These differences make it challenging to swap the inlet manifolds between the two engine designs without encountering performance issues or other problems.

cheers
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Old May 2, 2025 | 12:11 PM
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Do a search and where used on the PNs.... it should show up. 2013 PN reference.
22030-31040, BODY ASSY, THROTTLE W/THROTTLE POSITION SENSOR
17111-31171, MANIFOLD, INTAKE
17126-31050, STAY, SURGE TANK, NO.2
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