Knfilters Coupon Codes: 40% Off + 50 Coupons

Users' Choice — Recently Verified & Top Rated

3 Codes

10%OFF Code

♕ Users' Pick

10% Off Select K&N Filters Products Verified

Enjoy a 10% discount on a variety of select items from K&N Filters.

Used 11 hr ago 954 used

Did this code work?

20%OFF Code

♕ Users' Pick

20% Off Motor Oil Bundles Verified

Take advantage of a 20% discount on specially curated motor oil bundles.

Used 7 hr ago 633 used

Did this code work?

Code

♕ Users' Pick

Free K&N Tote Bag with $100+ Orders Verified

Receive a complimentary K&N tote bag when your order reaches $100. Simply add the tote to your cart to redeem.

Used 12 min ago 478 used

Did this code work?

Popular Coupon Codes — Verified & Used by Many

40 Codes

20%OFF Code

Popular

20% Off Air Filter Wrap with Air Intake System Purchase Verified

Get 20% off an air filter wrap when you also purchase an air intake system.

Used 25 min ago 528 used

Did this code work?

20%OFF Code

Popular

20% Off Home Air Filters Verified

Enjoy 20% off all K&N home air filters.

Used 11 hr ago 408 used

Did this code work?

10%OFF Code

Popular

10% Off Cleaning Kit with Air Filter Purchase Verified

Save 10% on a cleaning kit when you buy an air filter and a cleaning kit together.

Used 7 hr ago 373 used

Did this code work?

10%OFF Code

Popular

10% Off Sitewide Verified

Enjoy 10% off your entire order at K&N Filters.

Used 25 min ago 303 used

Did this code work?

10%OFF Code

Popular

10% Off Sitewide Verified

Save 10% on your entire purchase at K&N Filters.

Used 25 min ago 291 used

Did this code work?

10%OFF Code

Popular

10% Off Sitewide Verified

Score 10% off your entire purchase at K&N Filters.

Used 5 min ago 207 used

Did this code work?

20%OFF Code

Popular

20% Off K&N Face Covers Verified

Save 20% on K&N face covers.

Used 4 hr ago 234 used

Did this code work?

10%OFF Code

Popular

10% Off Sitewide Verified

Your order gets 10% off when you use this code at K&N Filters.

Used 12 min ago 221 used

Did this code work?

$50OFF Code

Popular

$50 Off Air Intakes Verified

Enjoy a $50 discount on all K&N air intake systems.

Used 2 hr ago 205 used

Did this code work?

15%OFF Code

Popular

15% Off Intake Kit and Exhaust System Bundle Verified

Get 15% off when you purchase an intake kit and an exhaust system together.

Used 4 hr ago 235 used

Did this code work?

Code

Popular

Free K&N Hat with $50+ Orders Verified

Get a free K&N hat when you spend $50 or more. Make sure to add the hat to your cart!

Used 1 min ago 197 used

Did this code work?

10%OFF Code

Popular

10% Off Sitewide Verified

Get 10% off all items across the K&N Filters store.

Used 42 min ago 166 used

Did this code work?

$10OFF Code

Popular

$10 Off Home Air Filter & HVAC Cleaner Bundle Verified

Purchase a home air filter and a K&N HVAC filter cleaner (99-6010) together and get $10 off.

Used 12 min ago 154 used

Did this code work?

Code

Popular

Free Gift with $100+ Orders Verified

Receive a free gift with any order totaling $100 or more.

Used 1 min ago 140 used

Did this code work?

$5OFF Code

Popular

$5 Off Cabin Air Filters Verified

Take $5 off your purchase of K&N cabin air filters.

Used 25 min ago 127 used

Did this code work?

20%OFF Code

Popular

20% Off Air Filters and Cabin Filters Verified

Score 20% off when you purchase K&N air filters and cabin filters.

Used 2 hr ago 108 used

Did this code work?

10%OFF Code

Popular

10% Off Sitewide Verified

Enjoy a 10% discount on your total order from K&N Filters.

Used 42 min ago 81 used

Did this code work?

10%OFF Code

Popular

10% Off Sitewide Verified

Take 10% off everything on the K&N Filters website.

Used 1 min ago 91 used

Did this code work?

Code

Popular

Free Hat with $50+ Orders Verified

Receive a complimentary hat with any order of $50 or more. Remember to add the hat to your cart!

Used 12 min ago 79 used

Did this code work?

Code

Popular

Free Gift with Air Intake Purchase Verified

Get a free gift when you purchase an air intake system.

Used 2 hr ago 94 used

Did this code work?

$10OFF Code

Popular

$10 Off Cleaning Kit with Cabin Air Filter Purchase Verified

Get $10 off the cleaning kit when you purchase both a cabin air filter and a cabin air filter cleaning kit.

Used 4 hr ago 81 used

Did this code work?

$5OFF Code

Popular

$5 Off K&N Wiper Blades Verified

Enjoy $5 off specially selected K&N wiper blades.

Used 42 min ago 67 used

Did this code work?

15%OFF Code

Popular

15% Off Motor Oil Verified

Save 15% on all K&N motor oil products.

Used 4 hr ago 53 used

Did this code work?

Code

Popular

Free Oil Filter & Air Filter with $25+ Orders Verified

Receive a free oil filter and air filter when your order is $25 or more.

Used 12 min ago 60 used

Did this code work?

15%OFF Code

Popular

15% Off K&N Oil Filter & Motor Oil Bundles Verified

Take 15% off when you buy K&N oil filter and motor oil bundles.

Used 4 hr ago 63 used

Did this code work?

10%OFF Code

Popular

10% Off Wiper Blades, Oil Filter, Motor Oil & Air Filter Cleaning Kit Bundle Verified

Save 10% when you buy a bundle including wiper blades, an oil filter, motor oil, and an air filter cleaning kit.

Used 5 min ago 51 used

Did this code work?

$2OFF Code

Popular

$2 Off Oil Filters Verified

Get $2 off any K&N oil filter.

Used 1 min ago 47 used

Did this code work?

Code

Popular

Free Gift with Air Filter Purchase Verified

Get a free gift when you buy an air filter.

Used 12 min ago 50 used

Did this code work?

$5OFF Code

Popular

$5 Off Lifetime Washable Home Air Filter Verified

Save $5 on a lifetime washable home air filter from K&N.

Used 5 min ago 47 used

Did this code work?

$5OFF Code

Popular

$5 Off Cabin Filters Verified

Enjoy $5 off when you purchase K&N cabin filters.

Used 11 hr ago 51 used

Did this code work?

Code

Popular

Free Glove with $200+ Orders Verified

Spend $200 or more and receive a free glove with your purchase.

Used 42 min ago 42 used

Did this code work?

25%OFF Code

Popular

25% Off Wiper Blades Verified

Enjoy 25% off K&N wiper blades.

Used 5 min ago 37 used

Did this code work?

20%OFF Code

Popular

20% Off Wipers Verified

Get 20% off all K&N wiper products.

Used 5 min ago 37 used

Did this code work?

Code

Popular

Free Fender Cover with $100+ Orders Verified

Add a free fender cover to your order when you spend $100 or more.

Used 12 min ago 40 used

Did this code work?

Code

Popular

Buy One Get One Free Face Cover Verified

Purchase one face cover and get a second one absolutely free. Limit two items per order.

Used 11 hr ago 32 used

Did this code work?

$15OFF Code

Popular

$15 Off Throttle Control Verified

Get a $15 discount on K&N throttle control devices.

Used 7 hr ago 26 used

Did this code work?

Code

Popular

Free K&N Face Covers Verified

Receive complimentary K&N face covers with your order.

Used 5 min ago 28 used

Did this code work?

40%OFF Code

Popular

40% Off Selected Products Verified

Take advantage of a 40% discount on a selection of K&N products.

Used 12 min ago 22 used

Did this code work?

Code

Popular

Free Gift with Air Intake or Exhaust System Purchase Verified

Receive a free gift when you buy an air intake or exhaust system.

Used 5 min ago 20 used

Did this code work?

Code

Popular

Free Gift with $150+ Orders Verified

Receive a complimentary gift when your purchase reaches $150.

Used 11 hr ago 16 used

Did this code work?

More Coupon Codes

7 Codes

Code

Free K&N T-shirt Sitewide Verified

Get a free K&N t-shirt with any order.

Used 7 hr ago 10 used

Did this code work?

Code

Free Fender Cover & Yeti Rambler with $200+ Orders Verified

Receive a free fender cover and Yeti Rambler when your order totals $200 or more.

Used 2 hr ago 8 used

Did this code work?

Code

Free Trunk Organizer with $100+ Orders Verified

Get a free trunk organizer with your order when you spend $100 or more.

Used 12 min ago 7 used

Did this code work?

Code

Free T-shirt with $50+ Orders Verified

Receive a complimentary K&N t-shirt when you spend $50 or more.

Used 7 hr ago 8 used

Did this code work?

20%OFF Code

20% Off New Washable Home Air Filters Verified

Save 20% on new washable home air filters from K&N.

Used 2 hr ago 6 used

Did this code work?

Code

Free Gift with Air Intake System Purchase Verified

Receive a complimentary gift when you purchase an air intake system.

Used 11 hr ago 5 used

Did this code work?

Code

Free Sunglasses with $75+ Orders Verified

Spend $75 or more and receive a pair of free sunglasses.

Used 25 min ago 4 used

Did this code work?

Knfilters vs Competitors

See how Knfilters deals compare to other top Auto & Motorcycle providers.

Best Offer Knfilters offers 40% off — the best value in Auto & Motorcycle category Get 40% Off

Provider	Best Discount	Coupons	Deals
Terrybicycles	Free Shipping	50 codes	—	Get Offer
Partsgeek	Free Shipping	35 codes	—	Get Offer
RealTruck	8% Off	30 codes	—	Get Offer
RevZilla	Free Spidi Warrior EVO Back Protector	30 codes	—	Get Offer
F1 Autocentres	£2	30 codes	—	Get Offer
Safelite	60% Off	30 codes	—	Get Offer

Top Working Knfilters Coupon Codes — November 2026

Coupon	Discount	Success Rate
Free Gift with Air Filter Purchase	Free Gift Off	100%
Free Oil Filter & Air Filter with $25+ Orders	Free Oil Filter Off	100%
Free Gift with Air Intake Purchase	Free Gift Off	100%
Free Gift with Air Intake or Exhaust System Purchase	Free Gigt Off	100%
40% Off Selected Products	40% off Off	100%

About Knfilters

K&N Engineering designs and manufactures high-flow air filters, air intake systems, and related performance automotive products. Their offerings cater to car enthusiasts and everyday drivers looking to enhance engine performance and efficiency. The brand also provides oil filters, motor oil, cabin air filters, and cleaning kits. These products are suitable for vehicle maintenance and upkeep, ensuring optimal operation for a wide range of automobiles.

Knfilters FAQs

How do I apply my KNFilters coupon code?

To apply a coupon code, simply enter it into the designated 'discount code' or 'promo code' box during the checkout process on the KNFilters website. Make sure to click 'apply' to see the discount reflected in your order total before finalizing your purchase.

Does KNFilters offer free shipping?

KNFilters often provides free shipping on qualifying orders. Check the website's shipping policy or look for banners on the homepage for current free shipping promotions. Specific terms and conditions may apply, such as a minimum order value.

What is the return policy for KNFilters products?

KNFilters typically accepts returns of unused and unopened products within a specified timeframe, usually 30 days from the date of purchase. Please review the detailed return policy on their website for eligibility criteria, instructions on how to initiate a return, and any associated fees.

Can I stack multiple coupon codes on a single KNFilters order?

Generally, KNFilters allows only one coupon code to be applied per order. If you have multiple codes, choose the one that offers the best discount for your purchase.

Does KNFilters have a student discount program?

While KNFilters may not have a formal, ongoing student discount program, it's always a good idea to check their promotions page or sign up for their newsletter. They occasionally offer special discounts that might be applicable to students or other specific groups.

When are the best times to find sales on KNFilters products?

Major sale periods like Black Friday, Cyber Monday, and holiday weekends are excellent times to look for discounts on KNFilters products. The company may also run seasonal sales or special promotions throughout the year.

How can I find out about new KNFilters deals and promotions?

The best way to stay informed about new deals and promotions from KNFilters is to subscribe to their email newsletter. You can also follow them on their social media channels or regularly check coupon websites like ours for the latest offers.