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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 Filter Universal Rubber Filter 2 3/4 inch 10 Degree Flange 4 inch OD 5 inch Height K&N Filter Universal Rubber Filter 2 3/4 inch 10 Degree Flange 4 inch OD 5 inch Height
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K&N Filter Universal Rubber Filter 2 3/4 inch 10 Degree...
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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K&N Universal Clamp-On Air Filter 1-15/16in 20 DEG FLG x 3-1/2in OD x 4in H K&N Universal Clamp-On Air Filter 1-15/16in 20 DEG FLG x 3-1/2in OD x 4in H
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K&N Universal Clamp-On Air Filter 1-15/16in 20 DEG FLG 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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K&N Filter Universal Rubber Oval Straight 4.5in OL x 3.75in OW x 7in Height 20 Degree Angle K&N Filter Universal Rubber Oval Straight 4.5in OL x 3.75in OW x 7in Height 20 Degree Angle
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K&N Filter Universal Rubber Oval Straight 4.5in OL x 3.75in...
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 Clamp-On Filter K&N Universal Clamp-On Filter
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K&N Universal Clamp-On Filter
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 - 2 1/4in 10 DEG FLG 3 1/2in OD 6in H K&N Universal Clamp-On Air Filter - 2 1/4in 10 DEG FLG 3 1/2in OD 6in H
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K&N Universal Clamp-On Air Filter - 2 1/4in 10 DEG...
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 Clamp-On Air Filter 6in Flange / 7-1/2in Base / 4-1/2in Top / 6in Height K&N Universal Clamp-On Air Filter 6in Flange / 7-1/2in Base / 4-1/2in Top / 6in Height
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K&N Universal Clamp-On Air Filter 6in Flange / 7-1/2in 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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$46.95
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K&N Universal Clamp-On Air Filter 6in Flange / 7-1/2in Base / 4-1/2in Top / 6in Height K&N Universal Clamp-On Air Filter 6in Flange / 7-1/2in Base / 4-1/2in Top / 6in Height
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K&N Universal Clamp-On Air Filter 6in Flange / 7-1/2in 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 Clamp-On Air Filter K&N Universal Clamp-On Air Filter
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K&N Universal Clamp-On Air Filter
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 Clamp-On Air Filter 3in Flange ID x 5in Base OD x 3.5in Top OD x 6in Height K&N Universal Clamp-On Air Filter 3in Flange ID x 5in Base OD x 3.5in Top OD x 6in Height
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K&N Universal Clamp-On Air Filter 3in Flange ID x 5in...
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 Clamp-On Air Filter 6in FLG / 7-1/2in B / 5in T / 6in H K&N Universal Clamp-On Air Filter 6in FLG / 7-1/2in B / 5in T / 6in H
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K&N Universal Clamp-On Air Filter 6in FLG / 7-1/2in 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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$63.95
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K&N Universal Clamp-On Air Filter 3-1/2in 10 Degree Flange 5-3/4in B 4-1/2in x 3-1/4in T 7in H K&N Universal Clamp-On Air Filter 3-1/2in 10 Degree Flange 5-3/4in B 4-1/2in x 3-1/4in T 7in H
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K&N Universal Clamp-On Air Filter 3-1/2in 10 Degree Flange 5-3/4in...
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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$76.95
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K&N Universal Clamp-On Air Filter 6in FLG 7-1/2in B 7in T 11in H K&N Universal Clamp-On Air Filter 6in FLG 7-1/2in B 7in T 11in H
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K&N Universal Clamp-On Air Filter 6in FLG 7-1/2in B 7in...
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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$109.95
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K&N Universal Round Clamp-On Air Filter 4-1/2in FLG, 5-7/8in B, 3-1/4in X 4-1/2in T, 8in H K&N Universal Round Clamp-On Air Filter 4-1/2in FLG, 5-7/8in B, 3-1/4in X 4-1/2in T, 8in H
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K&N Universal Round Clamp-On Air Filter 4-1/2in FLG, 5-7/8in 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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$76.95
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K&N Universal Clamp-On Air Filter 3-1/8in Dual FLG 8-7/8in X 5-3/16 B 6-1/4in X 4IN T, 9inH W/STUD K&N Universal Clamp-On Air Filter 3-1/8in Dual FLG 8-7/8in X 5-3/16 B 6-1/4in X 4IN T, 9inH W/STUD
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K&N Universal Clamp-On Air Filter 3-1/8in Dual FLG 8-7/8in 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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$63.95
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K&N Universal Clamp-On Air Filter 4-1/2in FLG / 5-7/8in B / 4-1/2in T / 8-3/8in H K&N Universal Clamp-On Air Filter 4-1/2in FLG / 5-7/8in B / 4-1/2in T / 8-3/8in H
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K&N Universal Clamp-On Air Filter 4-1/2in FLG / 5-7/8in 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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$63.95
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K&N Filter Universal X Stream Clamp-On 4-1/2in Flange 5-7/8in Base 4-1/2in Top 4-1/2in Height K&N Filter Universal X Stream Clamp-On 4-1/2in Flange 5-7/8in Base 4-1/2in Top 4-1/2in Height
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K&N Filter Universal X Stream Clamp-On 4-1/2in Flange 5-7/8in 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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$50.95
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K&N Universal Rubber Filter 6.25in x 4in Oval FLG / 7.375in x 5.5in Base / 6.25in x 4in Top / 5in H K&N Universal Rubber Filter 6.25in x 4in Oval FLG / 7.375in x 5.5in Base / 6.25in x 4in Top / 5in H
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K&N Universal Rubber Filter 6.25in x 4in Oval 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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$67.95
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K&N Filter Universal Rubber Filter 2-7/16in O/S Flange x 5-1/2in OD x 6in Height K&N Filter Universal Rubber Filter 2-7/16in O/S Flange x 5-1/2in OD x 6in Height
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K&N Filter Universal Rubber Filter 2-7/16in O/S Flange x 5-1/2in...
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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$76.95
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K&N Universal Rubber Filter 2.125in Flange ID/3in x 4in Tapered Oval/2.75in Height (4 Filters) K&N Universal Rubber Filter 2.125in Flange ID/3in x 4in Tapered Oval/2.75in Height (4 Filters)
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K&N Universal Rubber Filter 2.125in Flange ID/3in x 4in Tapered...
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 Rubber Filter - Round Straight 2.688in Flange ID x 4.5in OD x 5in H K&N Universal Rubber Filter - Round Straight 2.688in Flange ID x 4.5in OD x 5in H
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K&N Universal Rubber Filter - Round Straight 2.688in Flange ID...
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 Rubber Filter 2-7/16in Flange ID x 4-1/2in OD x 4-5/16in OD-T 5in Height K&N Universal Rubber Filter 2-7/16in Flange ID x 4-1/2in OD x 4-5/16in OD-T 5in Height
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K&N Universal Rubber Filter 2-7/16in Flange ID x 4-1/2in 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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$63.95
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K&N Universal Air Filter - 2-7/16in Flange x 4-1/2in OD B x 4-5/16in OD-T x 4in Height K&N Universal Air Filter - 2-7/16in Flange x 4-1/2in OD B x 4-5/16in OD-T x 4in Height
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K&N Universal Air Filter - 2-7/16in Flange x 4-1/2in 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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$42.95
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K&N Universal Clamp-On Air Filter 2-7/16in FLG / 3-1/2in OD / 6in H K&N Universal Clamp-On Air Filter 2-7/16in FLG / 3-1/2in OD / 6in H
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K&N Universal Clamp-On Air Filter 2-7/16in FLG / 3-1/2in 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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$46.95
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K&N Universal Rubber Filter 2.438in Flange ID x 3.5in OD x 5in Height for 97-98 Yamaha TDM850 K&N Universal Rubber Filter 2.438in Flange ID x 3.5in OD x 5in Height for 97-98 Yamaha TDM850
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K&N Universal Rubber Filter 2.438in Flange ID x 3.5in 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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$42.95
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