Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
K&N Custom Round Air Filter 14in OD 12in ID 4in HeightExperience superior engine performance and protection with the K&N Custom Round Air Filter, model E 3730. Designed for enthusiasts seeking high quality filtration, this air filter features a 14 inch outer diameter, 12 inch inner diameter, and a 4 inch height, making it an excellent fit for a variety of applications. Crafted by K&N Engineering, a trusted name in automotive performance, this drop in air filter is engineered to deliver enhanced airflow
Experience superior engine performance and protection with the K&N Custom Round Air Filter, model E-3730. Designed for enthusiasts seeking high-quality filtration, this air filter features a 14-inch outer diameter, 12-inch inner diameter, and a 4-inch height, making it an excellent fit for a variety of applications.Crafted by K&N Engineering, a trusted name in automotive performance, this drop-in air filter is engineered to deliver enhanced airflow while trapping harmful contaminants. The durable construction ensures long-lasting use and reliable performance under demanding conditions.
Upgrade your vehicle’s air intake system with this custom round air filter and enjoy improved throttle response, increased horsepower, and extended engine life. Its easy installation design helps you get back on the road or track faster with peace of mind.
The E-3730 air filter combines efficiency and convenience, backed by K&N’s legacy of expert automotive engineering. Whether you’re tuning your car for street use or motorsport, this product is a dependable choice to keep your engine breathing clean and running strong.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 1825 reviews
Sort
Product Reviews
★★★★★ 5
Great
Activated sim to iPhone SE without a problem.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 3
Not the best
One of the sim card wernt able to be activated
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 22, 2024
★★★★★ 5
Works as prepaid sims for T mobile
I had postpaid T mobile connection (part of family plan) and I wanted to shift to the prepaid one (T mobile connect 15$/mo) as it was cheaper for me.
I called up T mobile customer care, they asked for the
(1) family plan account #, and
(2) the account pin
(3) a new sim card (this one from amazon)
I just had the account # and told them the name and cell no. of the family plan head, so they called him up and got authorization to drop me from the family plan.
They then transferred me to their prepaid division, they asked me for the Sim # (not the cell phone no.) that is written on the back of the sim cards purchased from amazon. Then they just transferred/ported my old no. from postpaid (family-plan) to my individual pre-paid plan. After, the phone got disconnected with customer care (as the old sim now became defunct). I replaced my old sim with my new sim (but with old cell #).
Even though they said that it will take 24-48 hours for my new sim to be activated, it got activated in 5 minutes and I received welcome texts from T-mobile. Could not be happier! It was no hassle at all.
Additionally, T-mobile gave me 1 month of free usage in prepaid. It has been almost 1 month that I saving around 10$/mo with this prepaid connection, I have faced no issues.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 18, 2020
★★★★★ 5
Good stuff
Size: 6 Fl Oz (Pack of 1)
Very good. Works like shampoo and helps reduce greys
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
TRY IT!
Size: 6 Fl Oz (Pack of 1)
Just try it. It really works well. And makes your hair look natural and not dyed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
recommand products
Ansell AMER1/1/S/CF/DM3 Mercurial 1 IP54 13W/20W 2xCCT LED Bulkhead with Corridor Function & DALI-Emergency Silver 3000K/4000K
150.02
Knightsbridge CSCREW50FBK M3.5 x 50mm Flat-Head Countersunk Electrical Socket Screw - Black (100 Pack)
35.00
Knightsbridge CSCREW35 M3.5 x 35mm Raised-Head Countersunk Electrical Socket Screw - Nickel Plated (100 Pack)
17.00
18K Yellow & White Paperclip Chain Bracelet with Zircon Stones
425.00
Genuine Ford KA 2008-2016 1.2L Petrol Timing Chain Tensioner Arm 1535439
62.00