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  • 18 years of BMW Tuning.
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    Turner Motorsport Power Pulley Kit - E39 528i 97-98
    Part #: PPK-E39

    Underdrive Power Pulleys work to 'free up' horsepower. Any accessory that spins from the main drive belt is using up power. That's power that could otherwise be used to move the car. By giving some of that power back to the engine, you can make the car faster! It's like FREE HORSEPOWER!

    Underdrive pulleys for your BMW will slow down engine-mounted accessories - the water pump, power steering pump, and alternator*. These systems contribute to 'parasitic losses' - power lost from what the engine could produce if it did not have these systems. Since less energy is used to move them, that power is transferred back to the engine and used to propel the car. Our pulleys give a 10-20% reduction in rotation, releasing up to 11hp on most BMW six-cylinder engines. There's also a small but noticeable improvement in throttle response too! We have done extensive testing and development work, both on and off the track, to ensure that the accessory systems function as they should. On our Racing pulley kits we actually underdrive certain components more so we feel our Street pulleys are an ideal compromise between power/torque gains, reliability, and system performance. Our pulley kits have been on the market for over ten years, and used in all of our own cars, with zero component failures related to their use.

    Our pulleys are made from T-6061 aluminum and finished in a durable black hard anodize that is very resistant to wear, chemical exposure, and heat. We designed our pulleys to look similar to the factory parts but also to be stronger and, in most cases, slightly lighter too. For example, a Turner alternator pulley is more than half the weight of the stock steel pulley! With our hardcoat aluminum you will never have to worry about a serious failure of a stock plastic pulley. A 'stealth' approach to aesthetics was our goal and we let the results speak for the pulley design. Installation is straight forward and easy with simple hand tools. Removal of the fan is required for access to the front of the engine. Total install time for a 3-piece pulley set should be around 1.5 hours. A new longer belt is included and we also recommend replacing the separate A/C belt, belt tensioners, and the guide and deflection pulleys at the same time.

    * Alternator Pulley Options
    Bosch or Valeo? BMW built your car with either a Bosch or Valeo brand alternator. Unfortunately, the pulley is not the same for both brands. The brand is usually printed on the black plastic cover of the alternator but may be facing the ground or facing away from you. If you know which brand you have, select your option below and we'll send you the correct alternator pulley for your BMW. If you don't know which you have it's NO PROBLEM! We can send you both. We will bill you for the second pulley but include a pre-paid return shipping box and issue you a refund when the un-used pulley is returned.

    Stereo Systems. We offer our kits in two different ways: the full Power Pulley Kit with all 3 pulleys or as a 2 pulley kit if you do not wish to underdrive your alternator (for large stereo systems or other critical-charging modifications). Our kits have been tested for compatability with the factory premium stereo systems (Harmon Kardon, etc). But any major upgrades from the factory premium systems will work best with our 2 pulley kit and no underdriving of the alternator. For all stock stereo systems the full 3-piece set is recommended because the Turner alternator pulley will help make more power and is also much lighter than the stock pulley.

    Additional Info
    Click here for example dyno graph

    Click here for installation instructions.

    Turner Pulley Kit contents:
  • Turner water pump pulley
  • Turner power steering pump pulley
  • Turner alternator pulley
  • new extended length belt
  • instructions


  • This underdrive pulley kit fits the following BMW:
    1997-1998 E39 BMW 528i




    Select Product Options:

    *Water Pump Pulley  
    Turner Water Pump Pulley [TEN3610003]
    *Power Steering Pump Pulley  
    Turner Power Steering Pump Pulley [TEN3610003]
    *Choose An Alternator Pulley Option  
    Bosch alternator pulley [TEN3610002]
    Valeo alternator pulley [TEN3610001]
    I don't know so send both alternator pulleys. [TEN3610001 + TEN3610002 + USPS-RETURN], Add $40.00 (USD)
    I have an upgraded stereo so do not send any alternator pulleys., Subtract -$40.00 (USD)
    I do not have a stereo upgrade but do not want an alternator pulley., Subtract -$40.00 (USD)
    *Main Drive Belt  
    New Main Drive Belt (Serpentine Belt) [060623]


    Base Price: $249.95 (USD)
    Customized Price: $249.95 (USD)

    Please select the available options below, then click show customized price to enable the Add to Cart / Add to Wishlist buttons.


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