DOWNLOAD THE APP
Customer Services
Copyright © 2025 Desertcart Holdings Limited
DOWNLOAD THE APP
🛠️ Elevate your engine’s breathability with Napa Gold precision!
The Napa 6637 Gold Air Filter is a premium, OEM-recommended air filter featuring a durable cellulose media and precise 12.38 x 4.5 x 12.38 inch dimensions. Designed for universal fit across various equipment, it ensures optimal engine protection and improved performance. Trusted by professionals and backed by a 4.7-star rating, this filter offers a cost-effective, high-quality upgrade for enhanced airflow and engine longevity.
| ASIN | B00K24KSDS |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #472,579 in Automotive ( See Top 100 in Automotive ) #5,782 in Automotive Replacement Air Filters |
| Brand | NAPA |
| Customer Reviews | 4.7 4.7 out of 5 stars (631) |
| Date First Available | March 22, 2014 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.6 pounds |
| Item model number | 6637 |
| Manufacturer | NAPA |
| Manufacturer Part Number | 46637 |
| OEM Part Number | 145898 |
| Product Dimensions | 12.38"L x 4.5"W x 12.38"H |
| Shape | Round |
| Special Features | Bottom I.D. (Inches): 4 in. Bottom I.D. (mm): 102 mm Bottom Inside Diameter: 4 in Bottom O.D. (Inches): 8.5 in. Bottom O.D. (mm): 216 mm Bottom Outside Diameter: 8.5 in Filter Type: Round Height: 12.38 in Height (Inches): 12.38 in. Height (mm): 314 mm Media Material: Cellulose Style: Air Filter Top I.D. (Inches): Closed Top I.D. (mm): Closed Top O.D. (Inches): 8.5 in. Top O.D. (mm): 216 mm Top Out… |
| UPC | 765809166073 |
T**.
High quality
The Napa 6637 Gold Air Filter is an automotive air filter designed for use in vehicle engines. It is designed to remove contaminants and debris from the air entering the engine, improving the performance and longevity of the engine. The Napa 6637 Gold Air Filter is washable and reusable, making it a cost-effective and environmentally-friendly option. It is also constructed with high-quality materials and features a sturdy, durable design. Overall, the Napa 6637 Gold Air Filter is a reliable and effective choice for automotive air filtration. It offers excellent value for the price, and it is built to last. I would recommend it to anyone in need of an automotive air filter.
T**D
Great upgrade
Added this filter to my 2000 7.3 powerstroke diesel and before I had a stock filter and box that was broken. Decided to upgrade to this and well worth the money! My truck builds better boost, makes better power and overall is feels smoother and a tad faster now. Great buy. Trucks breathing like it should!
A**R
Quality
Proper fit. Long lasting
D**M
Good filter
The filter arrived quickly and is a good fit.
R**D
That's a big 'ol filter right there
This is big. Really big. No idea how I'd tell if this is effective at filtering out particles, but I'm willing to trust NAPA on it. What I can tell you this DOES do is increase throttle response and turbo-charger spool up on a 1997 F250 7.3L. There's some fun noises too :-)
D**E
Early 99 F350 7.3 turbo
Works as expected. Can definitely hear turbo more and can feel a slight difference in acceleration. Did what was anticipated.
M**N
Awesome upgrade for the Ford 7.3
Awesome filter swap for the 7.3 Ford Diesal, maybe it is just the placibo effect but I feel like I have better power. It definitely is infinitely better then the stock set up. Be sure to buy a pre filter sock for it, helps keep it clean and will extend our filter life
B**N
This is great
Buy this filter, soooo much more air versus the garbage factory set up, and cold air intakes are not worth the money. I secured it with a few zip ties to to temporarily secure it in place It fits directly onto the factory air intake line. No additional parts needed
Trustpilot
1 day ago
4 days ago