{"product_id":"t-6061-aluminum-pulley-kit-with-belt","title":"T-6061 Aluminum Pulley Kit with Belt","description":"By slowing down essential engine accessories like the water pump, power steering pump, and alternator, the kit redirects more power back to the engine, resulting in increased horsepower and a noticeable improvement in throttle response.\n\nConstructed from robust T-6061 aluminum and finished with a wear-resistant black hard anodize, these pulleys are designed for durability, chemical resistance, and heat tolerance. They offer a stronger and lighter alternative to stock components; for instance, the Turner alternator pulley is less than half the weight of the original steel unit. The kit is designed to reduce accessory rotation by 10-20%, potentially releasing up to 11hp on most BMW six-cylinder engines. Compatibility with factory premium stereo systems like Harmon Kardon is tested, though major stereo upgrades may benefit from the two-pulley kit option that excludes the alternator pulley.\n\nInstallation is straightforward, typically requiring about 1.5 hours and basic hand tools, with fan removal necessary for access. The kit includes a new, longer belt to accommodate the pulley changes. It is recommended to also replace the A\/C belt, belt tensioners, and guide\/deflection pulleys concurrently. Users must select the correct alternator pulley option, choosing between Bosch or Valeo, as BMW used both brands. Instructions are provided to help identify the alternator type.\n\nThis underdrive pulley kit is specifically designed for the 1999-2000 E39 BMW 528i model.","brand":"Turner Motorsport","offers":[{"title":"Default Title","offer_id":52664040063288,"sku":"PPK-E39","price":306.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687723819.jpg?v=1784332332","url":"https:\/\/store.motormia.co\/products\/t-6061-aluminum-pulley-kit-with-belt","provider":"MOTORMIA","version":"1.0","type":"link"}