{"product_id":"dayco-pbu81480ss25-engine-harmonic-balancer","title":"Dayco PBU81480SS25 Engine Harmonic Balancer","description":"\u003ch2\u003eOverview of Dayco Race Performance 8 Rib 25% Underdrive Harmonic Balancer\u003c\/h2\u003e\u003cp\u003eThe Dayco Race Performance 8 Rib 25% Underdrive Engine Harmonic Balancer (PBU81480SS25) is engineered for Chevrolet Camaro, Pontiac Firebird, and GTO models. Designed to reduce engine speed by 25%, this harmonic balancer supports improved engine performance and durability in high-demand applications.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Chevrolet Camaro, Pontiac Firebird, and GTO\u003c\/li\u003e\n\u003cli\u003e25% underdrive design to reduce engine RPM\u003c\/li\u003e\n\u003cli\u003e8 rib serpentine pulleys integrated for accessory drive\u003c\/li\u003e\n\u003cli\u003eNeutral counterweight balance with no additional counterweights\u003c\/li\u003e\n\u003cli\u003eSteel outer ring for durability and vibration dampening\u003c\/li\u003e\n\u003cli\u003eIncludes installation instructions for proper setup\u003c\/li\u003e\n\u003cli\u003eOverall outside diameter: 6.221 inches (158.00 mm)\u003c\/li\u003e\n\u003cli\u003eTwo integrated serpentine pulleys with 4 and 8 grooves respectively\u003c\/li\u003e\n\u003cli\u003eThree bolt hole configuration for secure mounting\u003c\/li\u003e\n\u003cli\u003eTiming marks included for accurate engine timing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis Dayco harmonic balancer features a 1.481 inch (37.60 mm) crank bore and a nose outside diameter of 2.128 inches (54.05 mm), ensuring precise fitment on compatible engines. The balancer includes two integrated serpentine pulleys, one with 4 grooves and the other with 8 grooves, both measuring 5.552 inches (141.00 mm) in diameter. The steel outer ring and 2.508 inch (63.68 mm) ring width provide robust vibration dampening to protect the crankshaft and improve engine longevity. The neutral counterweight balance design means no additional counterweights are present, maintaining engine balance without added mass. This part does not include hardware or a Woodruff key but comes with installation instructions to assist with proper setup.\u003c\/p\u003e\u003ch2\u003eAbout the Race Performance 8 Rib 25% Underdrive Product Line\u003c\/h2\u003e\u003cp\u003eThe Race Performance 8 Rib 25% Underdrive line by Dayco is designed to optimize engine accessory drive systems by reducing crankshaft speed by 25%. This underdrive feature helps lower parasitic losses, improving overall engine efficiency and performance in racing and high-performance street applications. The 8 rib serpentine pulley design supports multiple accessory drives with enhanced belt grip and durability, making it suitable for Chevrolet Camaro, Pontiac Firebird, and GTO engines requiring precise harmonic balancing and accessory drive control.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReduces engine RPM to decrease accessory load and improve efficiency\u003c\/li\u003e\n\u003cli\u003eMinimizes crankshaft vibration to protect engine components\u003c\/li\u003e\n\u003cli\u003eSupports serpentine belt systems with multiple accessory drives\u003c\/li\u003e\n\u003cli\u003eHelps maintain accurate engine timing with included timing marks\u003c\/li\u003e\n\u003cli\u003eProvides a durable steel outer ring for extended service life\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure crank bore and bolt hole quantity match engine specifications\u003c\/li\u003e\n\u003cli\u003eUse provided installation instructions for correct mounting procedure\u003c\/li\u003e\n\u003cli\u003eVerify timing marks alignment during installation for accurate engine timing\u003c\/li\u003e\n\u003cli\u003eNote that hardware and Woodruff key are not included and must be sourced separately\u003c\/li\u003e\n\u003cli\u003eCheck pulley groove count compatibility with existing serpentine belts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures this harmonic balancer to meet strict quality standards for durability and performance. Installation instructions are included to support proper fitment and function. Warranty details should be confirmed with the manufacturer or distributor, as they may vary by application and region.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391731859637,"sku":"BJTQ-PBU81480SS25","price":212.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_PBU81480SS25_Fro.jpg?v=1774729427","url":"https:\/\/www.partcatalog.com\/products\/dayco-pbu81480ss25-engine-harmonic-balancer","provider":"PartCatalog","version":"1.0","type":"link"}