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K&N 57-1002 Air Intake

57 Series FIPK > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.5 out of 5 stars   11 Customer Reviews
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Replaces entire factory air intake system
  • Free-flowing high density polyethylene tube
  • Easy to install, usually in 90 minutes or less
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty
The K&N 57-1002 Air Intake fits some BMW 323Ci, BMW 323i, BMW 325Ci, BMW 325i, BMW 325Xi, BMW 328Ci, and BMW 328i models. See vehicle applications link for details.
The K&N 57-1002 FIPK air intake system replaces the restrictive factory air filter and air intake housing in some BMW models. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your BMW’s engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine’s RPM range. The 57-1002 air intake comes with a K&N high-flow air filter and a heat shield that installs into the lower air box and connects to the factory fresh air tube. Air is directed past the mass air sensor and through an aerodynamically engineered intake tube into the engine’s throttle body for a guaranteed power gain. The tube accommodates the crankcase vent tube. The oversized tapered conical air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This air intake is relatively easy to install usually in 90 minutes or less using the existing factory mounting points. The tools needed are a screw driver, ratchet set and several wrenches. K&N 57 Series FIPK's are street legal in all 50 US states and come with K&N's Million Mile Limited Warranty.

[More Information on K&N FIPK Air Intake Systems]

Product Specifications

Estimated Horsepower Gain9.69 HP @ 6090 RPM
Replacement FilterRU-4730
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
Clamps Included3
Clamp MaterialStainless Steel
Clamp StyleRegular
CARB EO NumberD-269-31
Couplers Included1
TypeGen II
Product Style57 Series FIPK
Air Filter Height6.5 in (165 mm)
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight8.8 lb (4 kg)
Air Filter Large End Diameter6 in (152 mm)
Product Box Height12.25 in (311 mm)
Product Box Length20.25 in (514 mm)
Product Box Width12.25 in (311 mm)
Mounting Hardware IncludedYes
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 57-1002 Air Intake Product Reviews

Saturday, January 13, 2018 - Part 57-1002
Love it

Edward Berland
Riverview, Florida
Tuesday, September 26, 2017 - Part 57-1002
Just installed on my 325xi, and so far so good. Very simple and easy instructions, and the packaged arrived to my house 3 days after I ordered it. Only complaint is that I am not hearing a small squeal when in the lower gears. Otherwise looks and sounds great. Hard to tell if there is any power increase, but I have only had it installed a week.

Perry Eliassen
Spokane, Washington
Friday, July 22, 2016 - Part 57-1002
Incredible! I am an 18 year old on a very tight budget and had to work 2 weeks to get the money for it, and I was worried I would be disappointed in it. I mainly bought it for sound improvements and I got just that. With every push of the gas pedal I get a very distinct PSSHH sound as it gulps in air, and then it basically increased the volume of my engine. It did nothing to my exhaust sound, but the engine itself sounded far far better. Furthermore, I do not see a huge change in horsepower or MPG as 9HP is nothing drastic, but I am sure it still helps. I have a 2001 BMW 325i and this filter kit came with everything needed and I installed it within 90 minutes, and used tools I found around the house. This is the first and only modification I have ever done to any vehicle and the instructions were clear and easy. I am beyond happy with this purchase, and have recommended it to many friends.

Carson Litteral
Prospect, Kentucky
Monday, June 13, 2016 - Part 57-1002
I purchased this product for my 2004 BMW 325i. I had emailed the service department to ensure the product would fit my car, which they assured me that it would. When the product arrived I found out it did not fit my specific model (european model). I was very frustrated. However, the cutomer service representitives who handled my complaints and helped me return the product were incredibly helpful. I spoke with Victor as well Joel. Both of which were very helpful and handled my request very quickly. This was the third intake system I have purchased from you for three different vehicles. I am a big fan of your products and I will continue to be a customer in the future.

Nick Georges
Charlotte, North Carolina
Tuesday, May 17, 2016 - Part 57-1002
I had a problem with the mass air flow but once I cleaned it.... There wasn't any problem. My car sucks so much more air it's insane and the sound that the K&N makes... It's a beautiful sound. Thanks

New Jersey
Thursday, March 10, 2016 - Part 57-1002
In a word UNFRIGGIN'BELIEVEABLE Now where do I start .....Hmmmmm. Appearance: The part installed adds a very nice custom look to the vehicle with minimal expense. The parts themselves are all very well-made and clearly made out of high quality materials which will definitely last the lifetime of the vehicle. It would be nice if a second metal version of this kit was offered as well, but the plastic polymer materials look pretty bulletproof to me and the metal parts are all painted real well and will clearly last a long, long time. Add in the cool factor and this product is a home-run and is exactly what I was hoping for and what I would expect from K&N. Materials: Included absolutely everything yu would need to complete the task from instructions to every nut, bolt and clamp necessary for a 2005 BMW 325i 4-DR E46 chassis with the 2.5L V6 motor facelift hood. It is K&N guys, so the materials are top-notched as would be expected for the price and keep in mind there are plenty of other manufacturers offering more expensive intakes made with inferior materials, trust me I have checked them all before I decided on this FIPK for my car. Installation: If you are even slightly mechanically inclined it should take you much less than an hour to install from start to finish. If not, then maybe the 90 minutes K&N says. Personally it took me 21 minutes from start to finish. There are plenty of DIY videos on youtube, but honestly it is so straight forward I personally didn't even have to look at the instructions, the picture of the finished product covers it all. Performance: The car definitely has a power boost pick up with the allowance of more unrestricted air entering the air-stream. The motor sounds more aggressive for sure. This is not a turbo or an exhaust so my expectations were realistic, I was just hoping for little bit better get and go when I hit the gas pedal and this FIPK does that and more. OVERALL CONCLUSION: I consider myself the average everyday consumer, so I think most people ask themselves the same question I did after installing this product and that is very simply Is it worth spending this kind of money on a product like this. MY opinion and answer is ABSOLUTELY YES! I got a great product that was easy to install, has improved my vehicles performance and is sexy as hell. What more could you ask for. I wanted to give a decent-sized review because one word reviews like AWESOME, GREAT and WOW tell me nothing about the product. I hope this review helps to convey my PERSONAL experience and if it helps you make your decision then I have accomplished my task. Just plunk down the money and get yourself one, I GUARANTEE you won't regret your decision and YOUR CAR WILL THANK YOU AS WELL! ONE LAST NOTE: I ALSO PURCHASED THE K&N COVER FOR MY FILTER AND I HIGHLY RECOMMEND TO ANYONE GETTING ONE OF THESE THAT THEY DO THE SAME. It adds an extra $30 to the final cost, but it really does help to complete the package. Personally I think K&N SHOULD OFFER THESE PRE-FILTERS WITH THESE KITS, BUT THAT IS JUST MY PERSONAL OPINION. EXNAVYORDIE

Gilbert Martinez
Creedmoor, North Carolina
Friday, February 12, 2016 - Part 57-1002
Instructions straight forward.. and even without the chip update.. provides a punch