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Apexi Panel Filter - Subaru/Nissan Models (inc. 2002-2007 WRX/STi / 2003-2006 Nissan 350Z)

MODEL # APE 503-N101
Manufacturer Part # 503-N101


MSRP: $35.00

In stock! Ships same day
Free shipping on all orders over $200.00!

Buy as a package deal and save:
Stage 1 Performance Package ( Part Number:RSD S1-SUB-002-1)
Stage 1 Performance Package - Subaru WRX 2006-2007 / STI 2004-2007
As low as $1,150.84
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See (2) package deals that contain this product


Apexi is a household name in the world of JDM aftermarket products, and have made go fast parts employed by some of the fastest cars in motorsports. So you can trust Apexi even when it comes down to a simple panel filter for your vehicle.

The Apexi panel filters are a dry cotton style filter that offers a lot of surface coverage for the most effective filtration as possible. This filter is ideal for those of you who may not want to opt for an aftermarket cold air style filter just yet. The Apexi panel filter will out-perform, and out-filter your factory panel filter which will provide better performance and fuel economy.

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Brand: Apexi
Filter Color: Red
Filter Element Type: Dry
Filter Material: Cotton
Filter Reusable: No

Mfgr. Warranty: 1 year
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.



Verified Purchase

Work like a charm!
CSpodey 6 months ago
Drops right in, seems to work well. Quality product.
Verified Purchase

2003 WRX/Apexi Thoughts
dljackson907 1 year ago
The quality of this filter is superb. The frame around it is solid and completes itself with the rubber gasket surrounding the top to ensure that the filter box is sealed. It's a little more expensive than a cheap filter from Autozone when factoring in the shipping. But, would I buy it again? Definitely! I mean, who wouldn't want more JDM in their Subaru? I did notice slightly better throttle response, but that's more likely due to changing out the dirty filter. There isn't any noticeable increase in power since it's just a drop-in filter. The included date/mileage record sticker is a nice touch so you can keep track of when to change the filter again.
Verified Purchase

EJC 2 years ago
fit my 07 impreza 2.5i perfectly
Verified Purchase

Quality for a decent price
S1mpl3x1361625 2 years ago
I don't write many reviews but this is a good product. I've had three of these filters and not one problem. Better flow than OEM without sacrificing in filtration quality. It's a great little upgrade for those who want to keep their stock airbox.

Père Foura 3 years ago
Perfect fitment, and way better than a K&N filter with the dirty oil that mess up the maf sensor! 5 Star!

  • Q: Apexi filter  Fab 2 months ago


    Will this fit my 2002 Impreza RS?

    • A: This is not confirmed to fit the 2002 Impreza RS.

      Karsten B. 2 months ago
  • Q: Lifespan?   Cole Matthews 5 years ago


    Just installed it tonight on my 2002 WRX sedan. Fits perfectly and has worked great so far. I live in south Florida and it is my daily driver. How many miles can I expect out of this filter? No auto-x or track or anything, just some spirited driving here and there :) thanks. I presume around 4k?

    • A: Really Depends on your location, but I would check it every oil change to be sure.

      Kyle A. 5 years ago
  • Q: Will this filter work on my car?  hhhp 7 years ago


    Hi i have a 2007 subaru impreza 2.5i and i want to replace its stock air filter. In the owner's manual it says that the stock filter has oil on it so given that this Apexi is a dry filter i was wondering if it will not cause any unwanted effects on the air sensor or the intake system. Thank you

    • A: Great question! The reason the stock filter has an oil on it is because it is a wet designed filter. This one is a dry, as you stated. We have many many customers running this filter with zero downsides! There is no unwanted effects on the air sensor.

      Sterling W. 7 years ago
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