{"product_id":"dayco-pbu1639ss25-engine-harmonic-balancer","title":"Dayco PBU1639SS25 Engine Harmonic Balancer","description":"\u003ch2\u003eOverview of Dayco Race Performance 25% Underdrive Harmonic Balancer\u003c\/h2\u003e\u003cp\u003eThe Dayco Race Performance 25% Underdrive Engine Harmonic Balancer (PBU1639SS25) is engineered for Chrysler, Dodge, and Jeep vehicles, including models like the 300, Challenger, Charger, Durango, Grand Cherokee, and Wrangler. Designed to reduce parasitic drag, this harmonic balancer supports improved engine efficiency and performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUnderdrive ratio reduces accessory speed by 25%\u003c\/li\u003e\n\u003cli\u003eNeutral counterweight balance for smooth operation\u003c\/li\u003e\n\u003cli\u003eSteel outer ring for durability\u003c\/li\u003e\n\u003cli\u003eSingle integrated serpentine pulley with 6 grooves\u003c\/li\u003e\n\u003cli\u003eIncludes timing marks for precise engine tuning\u003c\/li\u003e\n\u003cli\u003eCompatible crank bore size of 1.475 inches (37.45 mm)\u003c\/li\u003e\n\u003cli\u003eThree bolt holes for secure mounting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Features and Specifications\u003c\/h2\u003e\u003cp\u003eThe PBU1639SS25 harmonic balancer features a 1.475-inch crank bore diameter, ensuring a precise fit for compatible Chrysler, Dodge, and Jeep engines. Its neutral counterweight balance design eliminates additional counterweights, maintaining engine smoothness without added complexity. The steel outer ring enhances durability and resistance to wear, while the overall outside diameter measures 5.788 inches (147.00 mm) with a width of 3.701 inches (94.00 mm). This balancer includes a single serpentine pulley with six grooves and an outside diameter of 4.689 inches (119.1 mm), optimized for accessory drive systems. Timing marks are integrated for accurate ignition and timing adjustments. Note that this part does not include hardware or installation instructions.\u003c\/p\u003e\u003ch2\u003eAbout the Race Performance 25% Underdrive Product Line\u003c\/h2\u003e\u003cp\u003eThe Dayco Race Performance 25% Underdrive line is designed to reduce accessory drive speed by 25%, lowering parasitic losses and improving engine output. This underdrive harmonic balancer is ideal for performance applications where reducing accessory drag is critical. By slowing down components like the alternator and power steering pump, it helps free up horsepower while maintaining engine balance and reliability.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReduces parasitic drag from engine accessories\u003c\/li\u003e\n\u003cli\u003eImproves throttle response and engine efficiency\u003c\/li\u003e\n\u003cli\u003eMinimizes vibration with neutral counterweight balance\u003c\/li\u003e\n\u003cli\u003eSupports accurate engine timing with integrated timing marks\u003c\/li\u003e\n\u003cli\u003eProvides a durable solution for high-performance Chrysler, Dodge, and Jeep engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure crank bore size matches 1.475 inches for proper fitment\u003c\/li\u003e\n\u003cli\u003eUse appropriate torque specifications for the three bolt holes\u003c\/li\u003e\n\u003cli\u003eVerify pulley alignment with accessory belts during installation\u003c\/li\u003e\n\u003cli\u003eTiming marks assist in setting ignition timing accurately\u003c\/li\u003e\n\u003cli\u003eHardware and installation instructions are not included; professional installation recommended\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures the PBU1639SS25 harmonic balancer to meet stringent quality standards, using durable steel materials and precision balancing. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls to ensure reliable performance in compatible Chrysler, Dodge, and Jeep vehicles.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391731826869,"sku":"BJTQ-PBU1639SS25","price":233.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_PBU1639SS25_Fro.jpg?v=1774729427","url":"https:\/\/www.partcatalog.com\/products\/dayco-pbu1639ss25-engine-harmonic-balancer","provider":"PartCatalog","version":"1.0","type":"link"}