★★★★★ 4
Run big
Size: 11, Color: Black
Worked for what they were needed for, they run big.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2025
K&N Universal Custom Air Filter - Oval Shape 9.313in OD / 2.375 Height
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N Universal Custom Air Filter - Oval Shape 9.313in OD / 2.375 HeightSKU: E 3988 UPC: 024844366818 K&N Universal Custom Air Filter Oval Shape 9. 313in OD 2. 375 Height for Harley Davidson Sportster 2004 2022 K&N E 3988 is a washable reusable oval air filter designed as a direct replacement for RK Series air cleaner assemblies on Harley Davidson Sportster motorcycles from 2004 to 2022. This high flow filter increases horsepower and acceleration by allowing greater airflow while maintaining strong filtration to protect
Quick Dispatch:
Your K&N Universal Custom Air Filter - Oval Shape 9.313in OD / 2.375 Height orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your K&N Universal Custom Air Filter - Oval Shape 9.313in OD / 2.375 Height ships.
Need Help?
Questions about K&N Universal Custom Air Filter - Oval Shape 9.313in OD / 2.375 Height, sizing, or delivery? We're just an email away.
Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for K&N Universal Custom Air Filter - Oval Shape 9.313in OD / 2.375 Height in your area.
Get Shipping Estimates
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
You may also like
K&N Toyota / Lexus / Scion 2.75in OD x 2.64in H Oil Filter
18.99
K&N Custom Air Filter 14in OD / 12in ID / 6in Height
157.99
K&N 97-00 Honda GL 1500CT / 97-03 1500C / 99-01 1500 Replacement Air Filter
94.99
K&N HVAC Filter - 12 X 20 X 1
59.99
K&N Replacement Air FIlter 12-13 Honda Integra 670/NC700S 670/NC700X 670
67.19
K&N Performance Oil Filter - 14-18 Fiat 500L 1.4L L4 Gas
15.99
K&N Performance Oil Filter for 03-14 Volkswagen Jetta
21.99
4.7 ★★★★★
Based on 2274 reviews
Sort
Product Reviews
★★★★★ 5
Appearance
Size: 8, Color: Tan
Looks better in person
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 5
very good
Size: 7.5, Color: Cognac
veryyyy gooood
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 29, 2026
★★★★★ 5
Nice shoes
Size: 9, Color: Cognac
My Husband loves it 😍
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 11, 2026
★★★★★ 4
I just need the size 12
Size: 12, Color: Tan
Gm.i made a mistake the first time when I order the size 13. I return it because it was to big .so I reorder a size 12 now am looking at my order they still sending me the same size 13 i will have to return it again because it is to big sorry I dont know what going
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
