Top 10 4.5 Inch Air Filter – Automotive Replacement Air Filters

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1. K&N

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Replacement Filter: Flange Diameter: 4.5 In, Flange Length: 0.625 In, RU-4740, Filter Height: 6 In, K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Shape: Round Tapered

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K&N #ad - Race tested: the official air filter of NASCAR. Saves money: k&n high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters. Low-maintenance design: 50, 000 miles before your first cleaning under normal highway driving conditions.

No-hassle warranty: 1-Year Limited Warranty. Engineered power: state-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Easy installation: pre-oiled and built with simple clamp-on design. A k&n filter will last longer than 10 disposable filters. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.

Eco-friendly: using a washable, reusable product helps reduce replacement waste. Trusted on the racetrack—made for your vehicle. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%. High quality: Made in America. World class protection: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
BrandK&N #ad
ManufacturerK&N Engineering #ad
Height7.13 Inches
Length6.44 Inches
Weight1 Pounds
Width6.38 Inches
Part NumberRU-4740
ModelRU-4740
WarrantyLIMITED WARRANTY

2. Injen

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Injen Technology X-1018-BR Black and Red 4.5" High Performance Air Filter

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Injen #ad - Pre-oiled from the factory for quick and easy setup. Built in velocity stack to help speed up air through intake pipe. Double layer cotton gauze not only filters dirt and debris but also works to straighten out air turbulence. Predetermined pleat size and quantity to ensure proper filtration and airflow rate. Measures 4. 5” opening, 6. 75” base diameter, 5” height and 5” top diameter.
BrandInjen #ad
ManufacturerInjen #ad
Height9 Inches
Length11 Inches
Weight1.8 Pounds
Width9 Inches
Part NumberX1018BR
ModelX-1018-BR
WarrantyLimited Litetime on Parts

3. K&N

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Premium, RU-3110, Filter Height: 3.25 In, Replacement Engine Filter: Flange Diameter: 4.5 In, K&N Universal Clamp-On Air Filter: High Performance, Flange Length: 0.625 In, Shape: Round Tapered

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K&N #ad - Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%. Easy installation: pre-oiled and built with simple clamp-on design. Race tested: the official air filter of NASCAR. Low-maintenance design: 50, 000 miles before your first cleaning under normal highway driving conditions.

High quality: Made in America. Eco-friendly: using a washable, reusable product helps reduce replacement waste. Engineered power: state-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.

World class protection: Pushing the limits of engine protection by protecting your engine from harmful contaminants. A k&n filter will last longer than 10 disposable filters. No-hassle warranty: 1-Year Limited Warranty. Saves money: k&n high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters. Trusted on the racetrack—made for your vehicle.
BrandK&N #ad
ManufacturerK&N Engineering #ad
Height7.13 Inches
Length6.44 Inches
Weight1.05 Pounds
Width6.38 Inches
Part NumberRU-3110
ModelRU-3110
WarrantyLIMITED WARRANTY

4. AEM

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AEM 21-206DK Universal DryFlow Clamp-On Air Filter: Round Tapered; 4.5 in 114 mm Flange ID; 5.125 in 130 mm Height; 6.0 in 165 mm Base; 5.125 in 130 mm Top

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AEM #ad - Manufactured in the USA. Designed to increase horsepower and throttle response. Outstanding performance even in dusty racing conditions. Captures up to 99% of harmful contaminants. Aem air filters are cleanable and guaranteed for the life of your vehicle.
BrandAEM #ad
ManufacturerAEM #ad
Height0 Inches
Length0 Inches
Weight1.2 Pounds
Width0 Inches
Part Number21-206DK
ModelAEM-21-206DK
WarrantyAEM Performance Products Warranty PolicyAdvanced Engine Management Inc. warrants to the consumer that all AEM High Performance products will be free from defects in material and workmanship for a period of twelve (12) months from date of the original purchase. Products that fail within this 12 month warranty period will be repaired or replaced at AEM’s option, when determined by AEM that the product failed due to defects in material or workmanship.This warranty is limited to the repair or replacement of the AEM part. In no event shall this warranty exceed the original purchase price of the AEM part nor shall AEM be responsible for special, incidental or consequential damages or cost incurred due to the failure of this product. Warranty claims to AEM must be transportation prepaid and accompanied with dated proof of purchase. This warranty applies only to the original purchaser of product and is non-transferable. All implied warranties shall be limited in duration to the said 12 month warranty period. Improper use or installation, use for racing, accident, abuse, unauthorized repairs or alterations voids this warranty. AEM disclaims any liability for consequential damages due to breach of any written or implied warranty on all products manufactured by AEM. Warranty returns will only be accepted by AEM when accompanied by a valid Return Merchandise Authorization (RMA) number. Credit for defective products will be issued pending inspection. Product must be received by AEM within 30 days of the date RMA is issued.If you have a warranty issue, please call (310) 484-2322, extension 203 and our customer service department will assist you. A proof of purchase is required for all AEM warranty claims.

5. K&N

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K&N Universal Clamp-On Air Filter: High Performance, Filter Height: 6 In, Replacement Filter: Flange Diameter: 4.5 In, Premium, RU-3480, Flange Length: 0.625 In, Washable, Shape: Round Tapered

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K&N #ad - No-hassle warranty: 1-Year Limited Warranty. Eco-friendly: using a washable, reusable product helps reduce replacement waste. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%. Low-maintenance design: 50, 000 miles before your first cleaning under normal highway driving conditions.

Easy installation: pre-oiled and built with simple clamp-on design. High quality: Made in America. Trusted on the racetrack—made for your vehicle. Saves money: k&n high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters. Race tested: the official air filter of NASCAR. World class protection: Pushing the limits of engine protection by protecting your engine from harmful contaminants.

A k&n filter will last longer than 10 disposable filters. Engineered power: state-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
BrandK&N #ad
ManufacturerK&N Engineering #ad
Height7.13 Inches
Length6.44 Inches
Weight1 Pounds
Width6.38 Inches
Part NumberRU-3480
ModelRU-3480
WarrantyLIMITED WARRANTY

6. K&N

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RG-1003RD-L, Replacement Engine Filter: Flange Diameter: 2.75 In, Filter Height: 4.5 In, Premium, K&N Universal Clamp-On Air Filter: High Performance, Flange Length: 1 In, Shape: Round Tapered

#ad
K&N #ad - Saves money: k&n high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters. Engineered power: state-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration.

Low-maintenance design: 50, 000 miles before your first cleaning under normal highway driving conditions. Easy installation: pre-oiled and built with simple clamp-on design. Race tested: the official air filter of NASCAR. No-hassle warranty: 1-Year Limited Warranty. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%. High quality: Made in America.

World class protection: Pushing the limits of engine protection by protecting your engine from harmful contaminants. Trusted on the racetrack—made for your vehicle. A k&n filter will last longer than 10 disposable filters. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains. Eco-friendly: using a washable, reusable product helps reduce replacement waste.
BrandK&N #ad
ManufacturerK&N Engineering #ad
Height5.51 Inches
Length7.01 Inches
Weight0.91 Pounds
Width6.5 Inches
Part NumberRG-1003RD-L
ModelRG-1003RD-L
Warranty12 Months

7. K&N

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Flange Length: 0.625 In, K&N Universal Clamp-On Air Filter: High Performance, Premium, Filter Height: 4.5 In, Shape: Round Tapered, Replacement Filter: Flange Diameter: 4.5 In, RU-1005, Washable

#ad
K&N #ad - Saves money: k&n high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters. Eco-friendly: using a washable, reusable product helps reduce replacement waste. Engineered power: state-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration.

No-hassle warranty: 1-Year Limited Warranty. Easy installation: pre-oiled and built with simple clamp-on design. High quality: Made in America. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%. Trusted on the racetrack—made for your vehicle. A k&n filter will last longer than 10 disposable filters.

Low-maintenance design: 50, 000 miles before your first cleaning under normal highway driving conditions. World class protection: Pushing the limits of engine protection by protecting your engine from harmful contaminants. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains. Race tested: the official air filter of NASCAR.
BrandK&N #ad
ManufacturerK&N Engineering #ad
Height6.38 Inches
Length6.38 Inches
Width7.13 Inches
Part NumberRU-1005
ModelRU-1005
Warranty1 Year Limited

8. Injen

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Injen Technology X-1018-BB 4.5" AMSOIL Ea Nano-Fiber Black and Blue Air Filter

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Injen #ad - Measures 2. 75” opening, 5” height and 4” top diameter, 5” base diameter, 40 pleats. Predetermined pleat size and quantity to ensure proper filtration and airflow rate. No oil needed for quick, easy setup and maintenance. Built-in velocity stack to help speed up air through intake pipe. Removes 5 times more dust than traditional cellulose filter media alone and 50 times more dust than wet gauze filter media.
BrandInjen #ad
ManufacturerInjen #ad
Height0 Inches
Length0 Inches
Width0 Inches
Part NumberX1018BB
ModelX-1018-BB
WarrantyLimited 4 Year on Parts

9. Airaid

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Red, Airaid AIR-720-128 Universal Clamp-On Air Filter: Oval Tapered; 4.5 Inch 114 mm Flange ID; 7.375 Inch 187 mm Height; 11.5 Inch x 7 Inch 292 mm x 178 mm Base; 9 Inch x 4.5 Inch 229 mm x114 mm Top

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Airaid #ad - Package dimensions :31. 115 cm l x24. 13 cm w x20955 cm H. Package weight :2. 9lbs. Country of origin :China. Product type :engine aIR FILTER.
BrandAiraid #ad
ManufacturerAiraid #ad
Height0 Inches
Length0 Inches
Weight1 Pounds
Width0 Inches
Part Number720-128
ModelAIR-720-128

10. Airaid

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Airaid 721-128 Universal Clamp-On Air Filter: Oval Tapered; 4.5 Inch 114 mm Flange ID; 7.375 Inch 187 mm Height; 11.5 x 7 Inch 292 mm x 178 mm Base; 9 x 4.5 Inch 229 mm x114 mm Top

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Airaid #ad - Increases performance and mileage. Hand built using the finest materials. Lifetime no hassle warranty. Superior filtration; no oil filter. Washable and reusable.
BrandAiraid #ad
ManufacturerAiraid #ad
Height0 Inches
Length0 Inches
Weight1 Pounds
Width0 Inches
Part Number721-128
ModelAIR-721-128
WarrantyLifetime No Hassle Warranty