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K&N Engineering - Performance Air Filters, Oil Filters, Intake Systems & More

Founded in 1969 in Riverside, California by racers Ken Johnson & Norm McDonald, K&N Engineering revolutionized filtration with the first washable, oiled cotton High‑Flow Air Filter™, designed to boost airflow while keeping engines cleaner—crafted to be reused for up to one million miles.

Over the next five decades, K&N expanded into bolt-on cold-air intakes (1992), Wrench‑Off oil filters (1988), cabin filters, fuel filters, and home A/C filters—now offering over 12,000 SKUs worldwide. Their 400,000 sq ft Riverside HQ, along with facilities in Texas, the UK, Netherlands, and China, houses advanced R&D with airflow benches, chassis dynos, vibration labs, and NASCAR/NHRA-grade pipelines.

K&N products are dyno-validated, ISO-tested, and built for both professional motorsports and daily drivers. Their renowned Million‑Mile/Million‑Mile warranty and global customer support reflect a legacy of trusted performance. Today, K&N continues to lead in innovation—delivering sustainable, high-performance filtration for millions of vehicles on the road.

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K&N Universal Clamp-On Air Filter 1-15/16in FLG / 3in B / 2in T / 2-1/2in L K&N Universal Clamp-On Air Filter 1-15/16in FLG / 3in B / 2in T / 2-1/2in L
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K&N Universal Clamp-On Air Filter 1-15/16in FLG / 3in B...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$67.95
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K&N Universal Chrome Filter - Round Tapered - 3in Base OD x 2in Top OD x 2.375in H K&N Universal Chrome Filter - Round Tapered - 3in Base OD x 2in Top OD x 2.375in H
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K&N Universal Chrome Filter - Round Tapered - 3in Base...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$63.95
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K&N Universal Round Clamp-On Air Filter 2in. Flange / 5-3/8in. OD / 2in. Height K&N Universal Round Clamp-On Air Filter 2in. Flange / 5-3/8in. OD / 2in. Height
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K&N Universal Round Clamp-On Air Filter 2in. Flange / 5-3/8in....
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$63.95
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K&N Universal Chrome Filter 2.125 in Flange ID / 3in Base OD / 2in Top OD / 2.75in H (4 per box) K&N Universal Chrome Filter 2.125 in Flange ID / 3in Base OD / 2in Top OD / 2.75in H (4 per box)
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K&N Universal Chrome Filter 2.125 in Flange ID / 3in...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$168.95
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K&N Universal Chrome Filter 2.125 in Flange ID / 3in Base OD / 2in Top OD / 2.75in Height K&N Universal Chrome Filter 2.125 in Flange ID / 3in Base OD / 2in Top OD / 2.75in Height
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K&N Universal Chrome Filter 2.125 in Flange ID / 3in...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$50.95
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K&N Universal Chrome Filter 2 1/8 inch FLG / 3 inch Bottom / 2 inch Top / 3 inch Height K&N Universal Chrome Filter 2 1/8 inch FLG / 3 inch Bottom / 2 inch Top / 3 inch Height
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K&N Universal Chrome Filter 2 1/8 inch FLG / 3...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$63.95
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K&N 1-13/16in flg3in b2in t3in h (4 Per Box) K&N 1-13/16in flg3in b2in t3in h (4 Per Box)
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K&N 1-13/16in flg3in b2in t3in h (4 Per Box)
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$120.95
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K&N Universal Air Filter 1-13/16in FLG / 3in Bottom / 2in Top / 3in Height K&N Universal Air Filter 1-13/16in FLG / 3in Bottom / 2in Top / 3in Height
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K&N Universal Air Filter 1-13/16in FLG / 3in Bottom /...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$63.95
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K&N Universal Round Tapered Chrome Filter 1.563in Flange ID x 3in Base OD x 2in Top OD x 3in H K&N Universal Round Tapered Chrome Filter 1.563in Flange ID x 3in Base OD x 2in Top OD x 3in H
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K&N Universal Round Tapered Chrome Filter 1.563in Flange ID x...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$50.95
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K&N Universal Chrome Filter 2 1/2 inch O/S FLG / 4 1/2 inch OD / 2 inch Height K&N Universal Chrome Filter 2 1/2 inch O/S FLG / 4 1/2 inch OD / 2 inch Height
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K&N Universal Chrome Filter 2 1/2 inch O/S FLG /...
K&N's Universal Pancake Style Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and...
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$63.95
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K&N 2-1/8in flg3-1/2in b2in t4in h (3 Per Box) K&N 2-1/8in flg3-1/2in b2in t4in h (3 Per Box)
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K&N 2-1/8in flg3-1/2in b2in t4in h (3 Per Box)
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$96.95
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K&N Universal Clamp-On Air Filter 2-1/8in Flange 3-1/2in Base 2in Top 4in Height K&N Universal Clamp-On Air Filter 2-1/8in Flange 3-1/2in Base 2in Top 4in Height
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K&N Universal Clamp-On Air Filter 2-1/8in Flange 3-1/2in Base 2in...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$55.95
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K&N Universal Chrome Filter-Round Straight 2.125in Flg ID x 3in OD x 3in H K&N Universal Chrome Filter-Round Straight 2.125in Flg ID x 3in OD x 3in H
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K&N Universal Chrome Filter-Round Straight 2.125in Flg ID x 3in...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$63.95
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K&N Universal Chrome Filter-Oval Tapered 4in Flg ID x 5.375in Base O/S W x 3.313in Top O/S W K&N Universal Chrome Filter-Oval Tapered 4in Flg ID x 5.375in Base O/S W x 3.313in Top O/S W
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K&N Universal Chrome Filter-Oval Tapered 4in Flg ID x 5.375in...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$52.95
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K&N Universal Chrome Filter 2.25in Flange / 3.5in Base / 2in Top / 4in Height - 2 Per Box K&N Universal Chrome Filter 2.25in Flange / 3.5in Base / 2in Top / 4in Height - 2 Per Box
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K&N Universal Chrome Filter 2.25in Flange / 3.5in Base /...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$160.95
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K&N Universal Chrome Filter 2.25 Inch Flange / 3.5 Inch Base / 2 Inch Top / 4 Inch Height K&N Universal Chrome Filter 2.25 Inch Flange / 3.5 Inch Base / 2 Inch Top / 4 Inch Height
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K&N Universal Chrome Filter 2.25 Inch Flange / 3.5 Inch...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$50.95
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K&N Universal Chrome Filter 2.063in Flange ID x 3.5in Base OD x 2in Top OD x 4in H K&N Universal Chrome Filter 2.063in Flange ID x 3.5in Base OD x 2in Top OD x 4in H
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K&N Universal Chrome Filter 2.063in Flange ID x 3.5in Base...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$42.95
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K&N Universal Clamp-On Air Filter 1 7/8 in FLG / 3in B / 2in T / 3in H K&N Universal Clamp-On Air Filter 1 7/8 in FLG / 3in B / 2in T / 3in H
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K&N Universal Clamp-On Air Filter 1 7/8 in FLG /...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$50.95
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K&N Universal Chrome Filter 1 15/16 inch FLG / 3 inch Base / 2 inch Top / 3 inch Height K&N Universal Chrome Filter 1 15/16 inch FLG / 3 inch Base / 2 inch Top / 3 inch Height
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K&N Universal Chrome Filter 1 15/16 inch FLG / 3...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$33.95
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K&N Uni Chrome Oval Tapered Filter 2.125in FlgID x 4inB OL x 3inB OW x 3inT OL x 2inT OW x 2.75in H K&N Uni Chrome Oval Tapered Filter 2.125in FlgID x 4inB OL x 3inB OW x 3inT OL x 2inT OW x 2.75in H
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K&N Uni Chrome Oval Tapered Filter 2.125in FlgID x 4inB...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$55.95
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K&N Universal Chrome Filter 2.438in Flange ID x 5.125in OD x 2in H K&N Universal Chrome Filter 2.438in Flange ID x 5.125in OD x 2in H
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K&N Universal Chrome Filter 2.438in Flange ID x 5.125in OD...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$55.95
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K&N Universal Chrome Filter 1 3/8 inch FLG / 2 1/2 inch Base / 2 inch Top / 2 1/4 inch Height K&N Universal Chrome Filter 1 3/8 inch FLG / 2 1/2 inch Base / 2 inch Top / 2 1/4 inch Height
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K&N Universal Chrome Filter 1 3/8 inch FLG / 2...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$33.95
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K&N 1-7/8in flg 3in OD 5in H K&N 1-7/8in flg 3in OD 5in H
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K&N 1-7/8in flg 3in OD 5in H
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$40.95
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K&N Universal Rubber Filter 3 inch 5 Degree FLG 4 1/2 inch OD 5 inch Height K&N Universal Rubber Filter 3 inch 5 Degree FLG 4 1/2 inch OD 5 inch Height
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K&N Universal Rubber Filter 3 inch 5 Degree FLG 4...
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications....
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$42.95
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