{"product_id":"c6-zr1-corvette-overdrive-harmonic-balancer-kit","title":"C6 ZR1 Corvette Overdrive Harmonic Balancer Kit","description":"The Lingenfelter C6 ZR1 Corvette Overdrive Harmonic Balancer is engineered to boost performance for the 2009-2013 LS9 supercharged engine. It is designed to increase horsepower and torque beyond the factory output of 638 hp and 604 lb-ft by overdriving the supercharger, thereby raising its RPM. This enhancement is achieved by increasing the harmonic balancer's speed, which in turn also overdrives the power steering pump and water pump as they share the same pulley system.\n\nThis harmonic balancer kit does not replace the supercharger snout's driven pulley. A crucial aspect of the installation is the requirement for ECM programming to adjust overboost limits. When used alone, this balancer overdrives the supercharger by 14%. For even higher boost levels (14-15 lbs), it can be paired with the Lingenfelter 2.60-inch diameter supercharger driven pulley upgrade kit, though this combination necessitates higher octane fuel.\n\nIt is important to note that this balancer upgrade is not recommended for road racing or sustained high RPM applications due to the overdrive of the power steering and water pumps. For such demanding uses, Lingenfelter recommends their 2.60-inch diameter supercharger driven pulley upgrade kit (L250090309), which provides a 19% supercharger overdrive.\n\nThe kit includes the Lingenfelter ATI overdrive harmonic balancer hub, finished in black with an 11-rib configuration. The hub is designed with a keyway to accommodate the factory crank key. The installation hardware provided consists of a new crankshaft bolt and a friction washer, with specific torque instructions: 35 lbs ft plus 140 degrees.","brand":"Lingenfelter","offers":[{"title":"Default Title","offer_id":52686625276216,"sku":"L220100309","price":599.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/658756020.png?v=1784875417","url":"https:\/\/store.motormia.co\/products\/c6-zr1-corvette-overdrive-harmonic-balancer-kit","provider":"MOTORMIA","version":"1.0","type":"link"}