BMW Maintenance & Tune-Up Parts for BMW 3 Series E30 (1984-1991)

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Part of owning a BMW is the relationships we develop with our cars through years of driving pleasure and maintenance services alike. It is critical to guarantee the job is right the first time. With recommended OEM supplied components and by following the maintenance schedule, your BMW is sure to continue giving you years of enjoyment on the street or track. All the filters, service kits, service manuals, fluids, and more are right here to help keep your BMW in perfect shape.

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K&N - Corporate Logo
T#:4005
Part#: 33-2005
In Stock
$ 104.99 USD
Free Shipping
$ 104.99 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 - Corporate Logo
T#:4006
Part#: 33-2059
Ships in 4 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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K&N - Corporate Logo
T#:31125647
Part#: HP-1002
In Stock
$ 17.99

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

$ 15.99 USD
Free Shipping on orders $49 and up
$ 15.99 USD
Free Shipping on orders $49 and up

Genuine BMW Motorsport - Corporate Logo
T#:396369
Part#: 12311311449KT
Ships on Aug 19, 2026
$ 1,696.99 USD
Free Shipping on orders $49 and up

Group A racecars were the top of their class in both touring car and rally racing. Heavily modified and extremely fast these cars set out to demonstrate the best of what a manufacturer could do on the racetrack. It was the predecessor to the current DTM class racing and set a standard for many other divisions of motorsport to follow.  

One of the weaker points of the S14 engine, when speaking from a racing standpoint is the belt drive system. While fine for a street going car, a V-belt is not suitable for high RPM applications. On the track, most of your time will be spent in the higher rev range which puts extreme amounts of stress on the factory setup. BMW realised this and came up with a solution that involved doing away with the V belt system and using a 6 rib serpentine style instead.

Extremely resistant to slippage and failure this design holds up much better the abuse of track duty and won't leave you stranded and waiting for tow back to the pit. Additionally, this kit does not accommodate and a/c compressor and the alternator and waterpump are underdriven by way of slightly larger pulleys. Combined, this puts less of a load on the crankshaft which leads to more efficient power delivery to the ground. If you track you E30 M3, this is an essential upgrade and until now was extremely difficult to source. Do not skip this pivotal step in your engine build or overhaul and get a leg up on the competition the Group A way.
Please note this kit is special order and in non-returnable

Features:

  • Kit replaces all engine pulleys and crank damper
  • Includes 6 rib serpentine belt
  • Underdriven waterpump and alternator pulleys
  • Recommended for off road and racing use only 

This kit fits the following BMWs:
1986-1992 BMW M3 All 
 

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