If you own a 2008 Porsche 997.1 and need to replace or upgrade the airbox, knowing the exact part number is crucial. The airbox (also called the air cleaner housing) is a key component of the intake system, and using the wrong part can lead to poor fitment, check engine lights, or reduced performance. This guide provides the OEM part number for the 997.1 airbox, along with insights into aftermarket options and what to consider when making a purchase.
What Is the Airbox on a 2008 Porsche 997.1?
The airbox on a 2008 Porsche 997.1 (the first generation of the 997, produced from 2005 to 2008) houses the engine air filter and directs clean air into the intake plenum. The 997.1 came in several variants: Carrera, Carrera S, and Turbo (the Turbo model has a different layout due to twin turbos). The airbox design also changed between the 3.6L (Carrera) and 3.8L (Carrera S) engines. Knowing your engine code—M96.03 for 3.6L, M97.01 for 3.8L—helps ensure you get the correct part.
OEM Part Number for the 2008 Porsche 997.1 Airbox
For Carrera models (3.6L, non-S), the OEM airbox assembly part number is 997.110.091.01. This includes the upper and lower housing, but does not include the air filter. For Carrera S models (3.8L), the part number is 997.110.091.02. Note that these numbers are for the complete assembly; if you only need the lower housing or the ducting, there are separate numbers. For the 2008 997.1 Turbo, the airbox is integrated with the intercooler ducts, and the assembly part number is 997.110.091.03. Always verify with a Porsche dealer or reliable parts catalog, as superseded versions may exist (e.g., .01 replaced by .02).
Where to Verify Your Part Number
- Online Porsche parts diagrams (e.g., Pelican Parts, Porsche of America official site)
- Independent Porsche specialists (e.g., Suncoast Parts, ECS Tuning)
- Your VIN number – inputting it into a parts database can yield the exact parts for your specific vehicle
Aftermarket Airbox Options for the 997.1
Many owners upgrade the airbox for improved airflow or sound. High-quality aftermarket options include:
1. Performance Drop-In Filters
Not a new airbox, but a replacement filter (e.g., K&N, aFe) that fits the OEM housing. This is the simplest upgrade. No part number change needed, but you must clean and re-oil periodically.
2. Intake Systems That Replace the Airbox
Brands like Fabspeed, IPD Plenum, EVOMS, and AEM offer full intake kits that often replace the factory airbox. These typically include a larger plenum, better-flowing tubes, and a high-flow filter. They do not use OEM part numbers; instead, they have their own model-specific SKUs. For example, the Fabspeed 997.1 Carbon Fiber Intake part number is FAB-997-INT-CF. These are aftermarket and may require retuning for maximum benefit.
3. Used OEM Airboxes
If you need a low-cost replacement, salvage yards or eBay often list used airboxes by OEM part number. Be cautious of condition – check for cracks or missing clips.
How to Choose the Right Airbox
1. Stock Replacement vs. Upgrade
If your current airbox is cracked, damaged, or missing hardware, stick with the OEM part number above. It’s a direct fit and maintains engine reliability. If you want more intake sound or slight performance gains (5-10 hp), an aftermarket intake system may be beneficial. However, know that on a normally aspirated 997.1, gains are modest, and some intakes can cause lean conditions if not properly designed.
2. Check Compatibility with Your Model
- Carrera (3.6L) – OEM #997.110.091.01
- Carrera S (3.8L) – OEM #997.110.091.02
- Turbo – OEM #997.110.091.03 (note: Turbo airbox includes MAF sensor mounting specific to the twin-turbo setup)
- Carrera 4 and 4S – same airbox as the RWD versions (Carrera and Carrera S respectively)
3. What About the Air Filter?
The air filter is a separate item. OEM filter part numbers:
- 997.110.091.01 (for the 3.6L)
- 997.110.091.02 (for the 3.8L) – Wait, these are the airbox numbers. The filter itself is 948.110.091.01 for most 997.1 models. Double-check using your vehicle details.
Installation Considerations
- Tools needed: Basic sockets, screwdrivers, and possibly T20 Torx bits.
- Time: About 30 minutes to an hour.
- Steps: Remove the engine cover (on 997.1, the engine is accessed from the rear; you’ll need to remove the carpeted cover). Disconnect the MAF sensor connector. Unclip the airbox from the throttle body and remove the housing. Transfer the MAF to the new airbox if needed.
- Tip: Clean the throttle body while you have the airbox off—it’s a common maintenance step.
Practical Final Recommendation
For a direct replacement, order the OEM part number specific to your engine: 997.110.091.01 for 3.6L (Carrera), 997.110.091.02 for 3.8L (Carrera S), or 997.110.091.03 for Turbo. Verify compatibility with your VIN before purchasing. If you’re after a sportier sound and aren’t worried about emissions legality, consider a well-known aftermarket intake like the Fabspeed 997.1 Intake but be prepared to also upgrade the tune or plenum for maximum effect. Always prioritize proper fitment to avoid check engine lights.
Remember: The airbox is a simple part, but the wrong one can cost you time and money. Stick to verified sources and your vehicle’s exact specifications.