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 7 hr ago 762 used

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20%OFF Code

♕ Users' Pick

20% Off Motor Oil Bundles at K&N Filters Verified

Grab a 20% discount when you purchase a motor oil bundle from K&N Filters.

Used 42 min ago 652 used

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Code

♕ Users' Pick

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

Receive a complimentary K&N Tote Bag on orders totaling $100 or more. Remember to add the tote to your cart!

Used 1 min ago 495 used

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Popular Coupon Codes — Verified & Used by Many

40 Codes

20%OFF Code

Popular

20% Off Home Air Filters at K&N Filters Verified

Enjoy 20% off all K&N Home Air Filters.

Used 5 min ago 469 used

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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 order an Air Intake System.

Used 4 hr ago 368 used

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10%OFF Code

Popular

10% Off Cleaning Kits with Air Filter Purchase Verified

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

Used 4 hr ago 308 used

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10%OFF Code

Popular

10% Off Storewide at K&N Filters Verified

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

Used 5 min ago 315 used

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10%OFF Code

Popular

10% Discount on All Orders Verified

Apply this code for a 10% discount across the entire K&N Filters selection.

Used 25 min ago 291 used

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10%OFF Code

Popular

10% Savings on Storewide Purchases Verified

Enjoy 10% savings on any item you purchase from K&N Filters.

Used 1 min ago 223 used

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20%OFF Code

Popular

20% Off K&N Face Covers Verified

Enjoy a 20% discount on K&N Face Covers.

Used 5 min ago 224 used

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10%OFF Code

Popular

10% Off Everything Sitewide Verified

Get a 10% discount on all items available at K&N Filters.

Used 2 hr ago 241 used

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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 42 min ago 232 used

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$50OFF Code

Popular

$50 Off Air Intakes at K&N Filters Verified

Take advantage of a $50 discount on all K&N Air Intakes.

Used 11 hr ago 189 used

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Code

Popular

Free K&N Hat with $50+ Orders Verified

A free K&N Hat is included with orders of $50 or more. Ensure you add the hat to your cart.

Used 7 hr ago 197 used

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10%OFF Code

Popular

Save 10% on Your Entire Purchase Verified

Your order from K&N Filters will be reduced by 10% with this code.

Used 1 min ago 148 used

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$10OFF Code

Popular

$10 Off Home Air Filter & HVAC Cleaner Bundle Verified

Get $10 off when you purchase a Home Air Filter along with a K&N HVAC Filter Cleaner (99-6010).

Used 2 hr ago 159 used

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Popular

Free Gift with $100 Minimum Purchase Verified

Score a free gift with any order that meets or exceeds $100.

Used 5 min ago 138 used

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$5OFF Code

Popular

$5 Off K&N Cabin Air Filters Verified

Take $5 off your purchase of K&N Cabin Air Filters.

Used 5 min ago 133 used

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20%OFF Code

Popular

20% Off Air Filters and Cabin Filters Verified

Receive a 20% discount on all K&N Air Filters and Cabin Filters.

Used 5 min ago 108 used

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10%OFF Code

Popular

10% Off Your K&N Filters Order Verified

Redeem this offer for 10% off your total purchase at K&N Filters.

Used 5 min ago 89 used

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10%OFF Code

Popular

10% Off Sitewide Savings Verified

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

Used 7 hr ago 81 used

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Code

Popular

Free Hat with $50+ Orders Verified

A free hat is yours with any order of $50 or more. Make sure to add the hat to your cart!

Used 1 min ago 95 used

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Code

Popular

Free Gift with Air Intake Purchase Verified

A complimentary gift is yours when you purchase an air intake system.

Used 7 hr ago 91 used

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$10OFF Code

Popular

$10 Off Cabin Filter Cleaning Kit Bundle Verified

Enjoy $10 off the cleaning kit when you buy both a Cabin Air Filter and a Cabin Air Filter Cleaning Kit.

Used 5 min ago 88 used

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$5OFF Code

Popular

$5 Off K&N Wiper Blades Verified

Special offer: Save $5 on K&N Wiper Blades.

Used 5 min ago 67 used

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15%OFF Code

Popular

15% Off Motor Oil at K&N Filters Verified

Save 15% on all K&N Motor Oil products.

Used 4 hr ago 60 used

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Code

Popular

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

Get a free Oil Filter and Air Filter when your order totals $25 or more.

Used 42 min ago 57 used

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15%OFF Code

Popular

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

Bundle and save 15% on K&N Oil Filters and Motor Oil combinations.

Used 25 min ago 63 used

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10%OFF Code

Popular

10% Off Wiper Blades, Filters, and Motor Oil Bundle Verified

Save 10% on a bundle including Wiper Blades, Oil Filter, Motor Oil, and an Air Filter Cleaning Kit.

Used 11 hr ago 50 used

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$2OFF Code

Popular

$2 Off K&N Oil Filters Verified

Get $2 off any K&N Oil Filter.

Used 2 hr ago 50 used

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Code

Popular

Free Gift with Air Filter Purchase Verified

Enjoy a free gift when you buy an air filter.

Used 4 hr ago 48 used

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$5OFF Code

Popular

$5 Off Lifetime Washable Home Air Filter Verified

Enjoy $5 off the Lifetime Washable Home Air Filter from K&N.

Used 25 min ago 48 used

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$5OFF Code

Popular

$5 Off Cabin Filters at K&N Filters Verified

Take $5 off any K&N Cabin Filter purchase.

Used 1 min ago 51 used

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Code

Popular

Free Glove with $200+ Orders Verified

Receive a complimentary glove with your purchase when you spend $200 or more.

Used 5 min ago 39 used

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25%OFF Code

Popular

25% Off Wiper Blades at K&N Filters Verified

Save 25% on K&N Wiper Blades.

Used 7 hr ago 39 used

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20%OFF Code

Popular

20% Off Wipers at K&N Filters Verified

Get 20% off all K&N Wiper products.

Used 5 min ago 43 used

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Code

Popular

Free Fender Cover with $100+ Orders Verified

Add a free Fender Cover to your order when you spend $100 or more.

Used 11 hr ago 38 used

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Popular

Buy One Get One Free Facecover Verified

Purchase one facecover and get a second one absolutely free. Offer applies to two items.

Used 11 hr ago 32 used

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$15OFF Code

Popular

$15 Off Throttle Control at K&N Filters Verified

Get a $15 discount on K&N Throttle Control devices.

Used 12 min ago 30 used

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Code

Popular

Free K&N Face Covers Verified

Receive complimentary K&N Face Covers with your order.

Used 42 min ago 23 used

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40%OFF Code

Popular

40% Off Selected K&N Products Verified

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

Used 11 hr ago 20 used

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Code

Popular

Free Gift with Air Intake or Exhaust System Purchase Verified

Receive a free gift when you buy an Air Intake or an Exhaust System.

Used 7 hr ago 19 used

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Code

Popular

Free Gift with $150+ Orders Verified

Receive a complimentary gift when your order total reaches $150 or more.

Used 5 min ago 15 used

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More Coupon Codes

7 Codes

Code

Free K&N T-shirt Storewide Verified

Claim a free K&N T-shirt with any purchase from K&N Filters.

Used 25 min ago 11 used

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Code

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

Spend $200 or more and receive a free Fender Cover and a Yeti Rambler.

Used 25 min ago 8 used

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Code

Free Trunk Organizer with $100+ Orders Verified

Get a free Trunk Organizer with any order of $100 or more.

Used 1 min ago 7 used

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Code

Free T-shirt with $50+ Orders Verified

Receive a free K&N T-shirt when your order reaches $50 or more.

Used 5 min ago 7 used

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20%OFF Code

20% Off New Washable Home Air Filters Verified

Get 20% off the new line of washable home air filters from K&N.

Used 1 min ago 6 used

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Code

Free Gift with Air Intake System Purchase Verified

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

Used 42 min ago 5 used

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Code

Free Sunglasses with $75+ Orders Verified

Your purchase of $75 or more includes a pair of free sunglasses.

Used 1 min ago 4 used

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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
TetherTug	Free Shipping	212 codes	—	Get Offer
Enginediy	Free Shipping	199 codes	—	Get Offer
Engwe	€200	165 codes	—	Get Offer
Velotric	Free Gift	153 codes	—	Get Offer
Engwe	€70	131 codes	—	Get Offer
WalkingPad	60% Off	106 codes	—	Get Offer

Top Working Knfilters Coupon Codes — September 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 Gift Off	100%
40% Off Selected K&N Products	40% 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.