{"product_id":"dinan-underdrive-crankshaft-pulley-kit-bmw-m5-m6-13-percent-underdrive-billet-aluminum-e60-e63-e64","title":"Dinan Underdrive Crankshaft Pulley Kit - BMW M5\/M6 13 Percent Underdrive - Billet Aluminum - E60\/E63\/E64","description":"\u003cp\u003e13 Percent Underdrive - Billet Aluminum - E60\/E63\/E64\u003c\/p\u003e\n\u003cp\u003eDinan's lightweight billet aluminum crankshaft pulley underdrives each of the accessories by 13 percent, reducing parasitic drag on the engine for a 6 HP @ 8000 RPM and 4 lb-ft torque @ 8000 RPM gain on a stock vehicle. The Dinan underdrive pulley retains the factory harmonic crankshaft damper, eliminating vibration that might otherwise damage the crankshaft.\u003c\/p\u003e\n\u003cp\u003eThe kit includes all of the necessary mounting hardware, lightweight pulley, and shorter belts. This product is backed by our industry-leading 4 year\/50,000 mile warranty so you can rest assured that you are purchasing the best quality product for your BMW.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAll accessories are underdriven by 13% to decrease drag on the engine.\u003c\/li\u003e\n\u003cli\u003eLightweight billet aluminum crankshaft pulley, black anodized and engraved.\u003c\/li\u003e\n\u003cli\u003eIncludes mounting hardware and shorter belts.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HS Tuning","offers":[{"title":"Default Title","offer_id":45935103868988,"sku":"D560-0001","price":449.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5934\/4956\/files\/19c8b17fd011621e54a29e413bd50207640a9cfd.jpg?v=1785348958","url":"https:\/\/rpm-racing.com\/products\/dinan-underdrive-crankshaft-pulley-kit-bmw-m5-m6-13-percent-underdrive-billet-aluminum-e60-e63-e64","provider":"Racing Precision Motorsports","version":"1.0","type":"link"}