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K&N Aerosol Air Filter Cleaning Kit -
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This item is classified as Hazardous Materials and requires special shipping and handling. We cannot ship this item out of the US or with priority shi
K&N - Corporate Logo
T#:401641
Part#: 99-5000KT
In Stock
$ 24.00

This product was last offered at the strikethrough price on
06-03-2026

$ 23.99 USD
Free Shipping on orders $49 and up
$ 23.99 USD
Free Shipping on orders $49 and up

K&N Aerosol Air Filter Cleaning Kit provides a simple and effective solution to preserve and maintain your K&N air filter, ensuring it delivers optimal performance for a lifetime. This cleaning kit is specifically designed to clean and restore the airflow efficiency of your reusable air filter, saving you money by eliminating the need to purchase replacement filters.

The K&N Aerosol Air Filter Cleaning Kit includes a powerful degreaser that effectively removes dirt, grime, and contaminants from your air filter. Once cleaned, the kit’s specialized oil is used to recoat the filter, ensuring it continues to trap harmful particles while allowing maximum airflow.

Regular maintenance with this kit not only extends the life of your air filter but also enhances your engine’s performance by maintaining high air flow and exceptional filtration. Easy to use, the K&N Aerosol Air Filter Cleaning Kit is an essential tool for keeping your air filter in top condition.

  • Lifetime filter maintenance: Extends the lifespan of your K&N air filter, eliminating the need for replacements.
  • Improved engine performance: Restores airflow efficiency for optimal engine operation.
  • Cost-effective solution: Saves money by allowing you to maintain your existing air filter.
  • Easy application: Simple-to-use aerosol spray for cleaning and re-oiling.
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K&N Performance Drop-In Air Filter - E28 528e, E30 318i/325e/i, 8...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:4006
Part#: 33-2059
Ships in 3 Business Days
$ 57.99 USD
Free Shipping
$ 57.99 USD
Free Shipping

K&N's drop-in air intake filter is constructed from cotton gauze material between aluminum mesh - this makes for a long lasting, high performance drop-in intake filter. These are very easy to remove and maintain. Turner Motorsport recommends this as one of the first maintenance/modifications you make to your vehicle after you purchase! 

K&N's drop in air filters allow increased airflow - dirt and particles stick to the oil on these filters, making them more effective than traditional paper filters in terms of protection. Additionally, K&N believes their filters are more efficient than paper filers - this means more oxygen getting into the engine, allowing vaporized fuel to burn more efficiently and increasing horsepower and fuel economy. The best of both worlds!

750iL/850i requires 2 filters

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Aluminum Thermostat Housing Kit - M50
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:397222
Part#: 14-009
In Stock
$ 56.99 USD
Free Shipping on orders $49 and up
Plastic thermostat housing cracked on your M50?

Here are your choices: you can wait for the plastic factory thermostat housing cover to break and cause major overheating. (Even with a new stock cover, it won’t take long.) Or you can install a thoughtfully engineered all-aluminum thermostat housing cover from Active Autowerke and never experience this type of failure again. Currently there is no factory upgraded part to this problem. This is an aluminum extruded part that has all of the openings machine properly to fit like factory; from the mounting bolt holes, the seating of the thermostat to the sealing opening for the ORANGE gasket. Forged to exact factory tolerances, everything fits and this unit is a true easy bolt-on – especially suited for racing or load conditions like heavy traffic, where engine temp can rise rapidly. The housing is guaranteed never to break from overheating or over-tightening, and its CNC machined surface ensures a precise seat.

Unit comes complete with a new ORANGE sealing gasket; a new thermostat is recommended but not included.
For hotter climates, a 71 degree thermostat is recommended over the 82 degree unit.

Anything and everything BMW is the mantra at Active Autowerke. Since 1981 they have been serving the BMW community with custom turbocharger kits to a myriad of other innovative and inspiring performance parts.
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K&N Air Filter Recharge Kit - Aerosol
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This item is classified as Hazardous Materials and requires special shipping and handling. We cannot ship this item out of the US or with priority shi
K&N - Corporate Logo
T#:401640
Part#: 99-5000
In Stock
$ 23.99 USD
Free Shipping on orders $49 and up
Preserve & maintain your air filter for a lifetime like it was designed to be used

Active Autowerke Rotrex Traction Fluid - One Liter
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:397307
Part#: 12-032
Ships in 4 Business Days
$ 240.00 USD
Free Shipping
$ 240.00 USD
Free Shipping
Rotrex superchargers utilize a unique traction drive system that sets it apart from other centrifugal-style superchargers. For best performance, Rotrex recommends replacing this fluid every 50,000 miles. This bottle of traction fluid is plenty enough for one supercharger service (typically 750ml). 
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K&N Air Filter Wrap - Black
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:567052
Part#: RX-4990DK
Ships on Jul 7, 2026
$ 31.99 USD
Free Shipping on orders $49 and up

K&N Air Filter Wrap - Blue
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:567049
Part#: RX-4990DL
Ships in 6 Business Days
$ 31.99 USD
Free Shipping on orders $49 and up
Active Autowerke Signature Trunk Emblem
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:590914
Part#: AASIGNATUREPLAQU
Ships in 4 Business Days
4% off MSRP $ 45.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 43.00 USD
Free Shipping
4% off MSRP
$ 45.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 43.00 USD
Free Shipping
Stand out from the crowd, and give them a hint of what you've got going on under the hood, with the official Active Autowerke Signature Emblem! The emblem can be placed anywhere on the exterior, or interior of your BMW. Hefty stainless steel construction and durable double-sided tape will help ensure that it is never lost, even at speeds over 170+ MPH...Don't ask us how we know! Represent your favorite BMW tuner for all to see today!
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K&N Performance Drop-In Intake Filter - E34 525i M5
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:369535
Part#: 13721726916
Special Order: No Guaranteed ETA
$ 83.99 USD
Free Shipping
$ 83.99 USD
Free Shipping

K&N's drop-in air intake filter is constructed from cotton gauze material between aluminum mesh - this makes for a long lasting, high performance drop-in intake filter. These are very easy to remove and maintain. Turner Motorsport recommends this as one of the first maintenance/modifications you make to your vehicle after you purchase! 

K&N's drop in air filters allow increased airflow - dirt and particles stick to the oil on these filters, making them more effective than traditional paper filters in terms of protection. Additionally, K&N believes their filters are more efficient than paper filers - this means more oxygen getting into the engine, allowing vaporized fuel to burn more efficiently and increasing horsepower and fuel economy. The best of both worlds!

  • Covered by the K&N Million Mile Limited Warranty
  • Washable and reusable
  • Emissions legal in all 50 states
  • Will not void vehicle warranty
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K&N High-Flow Air Filter - M60,M62,S62
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:4007
Part#: 33-2675
Special Order: No Guaranteed ETA
$ 68.99

This product was last offered at the strikethrough price on
01-20-2026

$ 65.99 USD
Free Shipping
$ 65.99 USD
Free Shipping
This is absolutely the least expensive and easiest way to improve horsepower and extend the life of your air filter! K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!
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K&N Air Filter Squeezable Recharge Kit
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:4099
Part#: 99-5050
In Stock
$ 18.99 USD
Free Shipping on orders $49 and up
Cleaning and re-oiling your K&N filter will prolong its life and maintain K&N's performance advantage. You should clean your filter every year with water and K&N's cleaning solution and re-oil the filter every two years. K&N air fitlers come pre-oiled.
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K&N Air Filter Wrap - Red
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:567050
Part#: RX-4730DR
In Stock
$ 31.99

This product was last offered at the strikethrough price on
01-22-2026

$ 18.99 USD
Free Shipping on orders $49 and up
$ 18.99 USD
Free Shipping on orders $49 and up


K&N Air Filter Wrap - Red
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:567051
Part#: RX-4990DR
Ships in 7 Business Days
$ 31.99 USD
Free Shipping on orders $49 and up