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2001 Audi S4 Air Filters

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Latest Customer Reviews

K&N Air Filters Reviews


K&N vs OEM/stock

Reviewed By Scott W (Indianapolis, IN) Reviewed for a 2001 Audi S4 —8/25/2006 4:50 AM

I purchased a K&N air filter for my 2001 Audi S4 recently, and there's a slightly noticeable increase in horsepower. Quick shipping from the distributor. Highly recommended.

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aFe Pro-Dry S Air Filters Reviews


Good Product

Reviewed By Anthony D (SAN LEANDRO, CA) Reviewed for a 2013 Audi S4 —6/3/2014 8:52 AM

Just installed this air filter and it looks great. Slight increase in power. Still waiting to crunch the numbers on fuel economy. I definitely prefer this filter to one you have to re-oil. Overall I'm happy with my purchase.

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Green Air Filters Reviews


My 2001 Ford F-150 4x4

Reviewed By OMAR H (OAKLAND, CA) Reviewed for a 2001 Ford F-150 —8/15/2018 8:14 AM

I have been using a K&N filter for years. I install the Green filter and is different than night and day. Better performance after about 100 miles of driving. Also beter fuel economy I'm estimating about 4 miles per gallon. Thats is 104 miles extra per tank of gas. I have a 2014 Ford focus with duel exhaust and the Green filter and getting between 50 to 53 miles per gallon on the highway. I love the Green filter and the savings at the pump.

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Year Range For Audi S4 Air Filters