The Subaru Genuine Clutch Flywheel 12342AA090 provides the specific factory dimensions and material standards required for 2.5L-H4 EJ255 DOHC Turbo engines produced between 2005 and 2014. This part is a direct-fit replacement for manual transmission models in the Impreza WRX, Legacy GT, Outback XT, Forester XT, and Baja.
The 12342AA090 Flywheel is a heavy metal disc that stores rotational energy to smooth out engine power and engage the clutch, serving as the primary component in a vehicle’s clutch system. Because this is a genuine Subaru part, it is designed to meet the exact friction surface requirements and heat dissipation standards of the EJ255 engine. We selected this part for our comparison because it represents the OEM standard for high-torque turbo applications. However, the provided data does not specify the exact machining tolerances for the pilot bearing seat or the specific torque sequence for the hub bolts. Because even minor misalignments in the pilot bearing seat can cause clutch chatter or premature bearing failure, you must confirm these specific installation requirements in your vehicle’s service manual or with a Subaru parts specialist. Additionally, the provided facts do not list the required high-temperature grease or the specific pilot bearing included in the kit, so you should verify if these consumables are required for your specific build.
What to Check Before Buying the 12342AA090 Flywheel
Before ordering this flywheel, verify these technical details to ensure a successful installation and proper drivetrain performance.
- Confirm your vehicle has a manual transmission, as this flywheel is not compatible with automatic configurations.
- Verify your specific production date and region (US vs. JDM) with a dealer to ensure the 12342AA090 part number matches your manufacturing year.
- Check your service manual for the required “crush” bolt specifications or torque sequence to prevent flywheel warping.
- Identify if you need to purchase a separate pilot bearing or specialized high-temp grease, as these are often not included with the flywheel.
- Confirm the friction surface requirements if you plan on high-torque tuning, as standard OEM surfaces may glaze under extreme loads.
Comparing the 12342AA090 Flywheel to Other Options
The 12342AA090 Flywheel is the factory-specified solution for owners who prioritize maintaining original engine dynamics and heat management. For buyers seeking heavy-duty towing capabilities or extreme high-torque tuning, you might consider high-performance aftermarket options like a solid flywheel or a heavy-duty dual mass flywheel (DMF). While the OEM part ensures the correct spline count and hub diameter for the EJ255 engine, aftermarket alternatives may offer different weight distributions or friction materials designed for specific racing or towing applications. If you are keeping the vehicle in a stock configuration, the genuine Subaru part is the standard choice to avoid harmonic vibration or heat dissipation failures.
If you own a 2005-2014 Subaru with an EJ255 turbo engine and want to maintain factory-spec performance, choose the Subaru Genuine Clutch Flywheel 12342AA090.
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Subaru Genuine Clutch Flywheel 12342AA090
$409.99 price checked August 2026