{"product_id":"dayco-pbu1117ss25-engine-harmonic-balancer","title":"Dayco PBU1117SS25 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 (Part Number PBU1117SS25) is engineered for precision and durability in high-performance applications. Designed specifically for select Cadillac, Chevrolet, and Pontiac models, this harmonic balancer offers reliable crankshaft vibration dampening with a focus on race-ready performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Cadillac Caprice, Chevrolet Corvette, CTS, G8, and SS models\u003c\/li\u003e\n\u003cli\u003eNeutral counterweight balance for consistent engine operation\u003c\/li\u003e\n\u003cli\u003eSteel outer ring construction for enhanced durability\u003c\/li\u003e\n\u003cli\u003eTwo integrated serpentine pulleys with 4 and 6 grooves respectively\u003c\/li\u003e\n\u003cli\u003eIncludes timing marks and installation instructions\u003c\/li\u003e\n\u003cli\u003eUnderdrive design reduces accessory speed by 25%\u003c\/li\u003e\n\u003cli\u003e3 bolt hole configuration with a crank bore diameter of 1.481 inches (37.60 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Features and Specifications\u003c\/h2\u003e\u003cp\u003eThis harmonic balancer features a 1.481-inch crank bore and a 3-bolt hole pattern, ensuring a secure fit on compatible engines. The outer ring is made of steel, providing strength and resistance to wear. The overall outside diameter measures 6.930 inches (176.00 mm), with an overall width of 2.835 inches (72.00 mm). Two integrated serpentine pulleys are included: the first pulley has 4 grooves with a diameter of 6.142 inches (156.00 mm), and the second pulley has 6 grooves with a diameter of 5.512 inches (140.00 mm). This design supports accessory drive systems while reducing the speed by 25%, which can improve engine efficiency and accessory longevity.\u003c\/p\u003e\u003cp\u003eThe harmonic balancer does not include a crank trigger or exciter plate, nor does it come with hardware or a Woodruff key. However, installation instructions are provided to assist with proper setup. Timing marks are clearly indicated on the balancer to aid in accurate engine timing adjustments.\u003c\/p\u003e\u003ch2\u003eAbout the Race Performance 25% Underdrive Product Line\u003c\/h2\u003e\u003cp\u003eThe Dayco Race Performance 25% Underdrive line is tailored for performance enthusiasts seeking to optimize engine accessory drive speeds. By reducing pulley speed by 25%, this underdrive harmonic balancer decreases parasitic drag on the engine, which can contribute to improved throttle response and reduced accessory wear. This product line is designed with race and high-performance applications in mind, offering a balance between durability and performance enhancement.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReduces accessory drive speed to improve engine efficiency\u003c\/li\u003e\n\u003cli\u003eMinimizes crankshaft vibration for smoother engine operation\u003c\/li\u003e\n\u003cli\u003eSupports high-performance engine builds in Cadillac, Chevrolet, and Pontiac vehicles\u003c\/li\u003e\n\u003cli\u003eHelps prevent premature wear of belts and pulleys\u003c\/li\u003e\n\u003cli\u003eFacilitates accurate engine timing with integrated timing marks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure compatibility with your specific vehicle model: Cadillac Caprice, Chevrolet Corvette, CTS, G8, or SS\u003c\/li\u003e\n\u003cli\u003eUse the provided installation instructions for proper fitment and torque specifications\u003c\/li\u003e\n\u003cli\u003eVerify the 3-bolt hole pattern and crank bore size (1.481 inches) before installation\u003c\/li\u003e\n\u003cli\u003eCheck timing marks alignment during installation for accurate engine timing\u003c\/li\u003e\n\u003cli\u003eHardware and Woodruff key are not included; reuse existing components or source separately\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures this harmonic balancer to meet stringent quality standards, using durable steel materials and precise engineering. Installation instructions are included to ensure proper setup. Warranty details are subject to Dayco's standard policies; please consult the manufacturer or authorized distributor for specific warranty information related to part number PBU1117SS25.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391731630261,"sku":"BJTQ-PBU1117SS25","price":271.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_PBU1117SS25_Fro.jpg?v=1774729425","url":"https:\/\/www.partcatalog.com\/products\/dayco-pbu1117ss25-engine-harmonic-balancer","provider":"PartCatalog","version":"1.0","type":"link"}