SKU: 33-2473 | UPC: 024844304254
K&N Replacement Air Filter 10.188in O/S Length x 6.375in O/S Width x 1.063in H for 2012-2015 Honda Civic Si, 2013-2015 Acura ILX Base, 2017-2021 Acura NSX Base
The K&N 33-2473 replacement air filter delivers high-flow performance as a direct drop-in upgrade for your factory airbox. It fits 2012-2015 Honda Civic Si models, 2013-2015 Acura ILX Base, and 2017-2021 Acura NSX Base with 10.188in overall length, 6.375in overall width, and 1.063in height. Layered oiled cotton media increases airflow for added horsepower and acceleration while trapping contaminants.
Key Features
- 4 Layers of Protection: Multiple layers of premium cotton gauze with tacking agent form a mesh that blocks and traps dirt and debris for reliable engine protection.
- Washable and Reusable: Clean every 75,000 miles or 5 years under normal highway driving, lasting the life of your vehicle and reducing replacement needs.
- Easy Installation: Pre-oiled and ready to drop into factory airbox for straightforward upgrade with no tools or modifications required.
- Engineered Power: High-flow media design boosts horsepower, acceleration, and overall engine performance through improved airflow.
- Lifetime Limited Warranty: Backed by K&N No-Hassle Lifetime Limited Warranty for long-term durability and peace of mind.
Product Notes
- Use K&N cleaning kit for maintenance every 75,000 miles to restore performance.
- Reusable design saves up to $125 over 200,000 miles compared to disposable filters.
- Arrives pre-oiled in protective retail packaging.
Installation Notes
- Professional installation recommended.
- Direct drop-in replacement fits factory airbox without cutting or drilling.
- Compatible with OEM hardware, no additional parts needed.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2012-2015 | Honda | Civic | Si |
| 2013-2015 | Acura | ILX | Base |
| 2017-2021 | Acura | NSX | Base |
Why Choose K&N?
- Proven track record in motorsports and street performance filtration for over 60 years.
- State-of-the-art oiled cotton gauze construction for maximum airflow and filtration.
- Dyno-tested designs deliver measurable horsepower gains across thousands of applications.
Frequently Asked Questions
- Q: Will this fit my 2014 Honda Civic Si?
A: Yes, the 33-2473 is a direct OEM replacement for all 2012-2015 Honda Civic Si models with no modifications. - Q: What material is used in this filter?
A: Four layers of premium cotton gauze treated with oil create high-flow filtration that traps contaminants while allowing more air through. - Q: What is the warranty coverage?
A: Covered by K&N No-Hassle Lifetime Limited Warranty when used in normal conditions, with limitations applying.
Shipping & Handling
- Method: UPS or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: 11.75in L x 8.5in W x 1.75in H retail box
- Weight: 0.6 lbs
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